Amended 1978, 1980, 1984
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 474(r)(39), redesignated subsec. (q) as (p).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 714(p)(2)(F), amended par. (3) generally. Prior to amendment par. (3) related to partnership items of federally registered partnerships and provided that under regulations prescribed by the Secretary, rules similar to the rules of subsection (o) shall apply to the tax imposed by section 4986.
- 1980 Pub. L. 96-223 Pub. L. 96–223 added subsec. (q). Former subsec. (q), as added by section 212(a) of Pub. L. 95–600, redesignated (o). Former subsec. (q), as added by section 321(b)(2) of Pub. L. 95–600, redesignated (p).
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 212(a), added subsec. (q) relating to special rules for partnership items of Federally registered partnerships.
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 321(b)(2), added subsec. (q) relating to deficiency attributable to election under section 44B.
Cases: Badaracco v. Commissioner, 464 U.S. 386 (1984)
Forms: Form 8886; Form 1040; Form 1120; Form 709
Final rules 5
(a) General rule Except as otherwise provided in this section, the amount of any tax imposed by this title shall be assessed within 3 years after the return was filed (whether or not such return was filed on or after the date prescribed) or, if the tax is payable by stamp, at any time after such tax became due and before the expiration of 3 years after the date on which any part of such tax was paid, and no proceeding in court without assessment for the collection of such tax shall be begun after the expiration of such period. For purposes of this chapter, the term “return” means the return required to be filed by the taxpayer (and does not include a return of any person from whom the taxpayer has received an item of income, gain, loss, deduction, or credit).
Amended 1958, 1997
- 1997 Pub. L. 105-34 Pub. L. 105–34, § 1284(a), inserted at end “For purposes of this chapter, the term ‘return’ means the return required to be filed by the taxpayer (and does not include a return of any person from whom the taxpayer has received an item of income, gain, loss, deduction, or credit).”
- 1958 Pub. L. 85-859 Pub. L. 85–859 substituted “at any time after such tax became due and before the expiration of 3 years after the date on which any part of such tax was paid” for “within 3 years after such tax became due”.
Cases: Bufferd v. Commissioner, 506 U.S. 523 (1993)
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(b) Time return deemed filed
Amended 1966
- 1966 Pub. L. 89-809 Pub. L. 89–809 substituted “chapter 3, 21, or 24” for “chapter 21 or 24” in text of pars. (1) and (2) and inserted “and tax imposed by chapter 3” after “taxes” in par. (2) heading.
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(1) Early return For purposes of this section, a return of tax imposed by this title, except tax imposed by chapter 3, 4, 21, or 24, filed before the last day prescribed by law or by regulations promulgated pursuant to law for the filing thereof, shall be considered as filed on such last day.
Amended 2010
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 501(c)(2), inserted “4,” after “chapter 3,”.
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(2) Return of certain employment and withholding taxes For purposes of this section, if a return of tax imposed by chapter 3, 4, 21, or 24 for any period ending with or within a calendar year is filed before April 15 of the succeeding calendar year, such return shall be considered filed on April 15 of such calendar year.
Amended 2010
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 501(c)(3), substituted “and withholding taxes” for “taxes and tax imposed by chapter 3” in heading and inserted “4,” after “chapter 3,” in text.
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(3) Return executed by Secretary Notwithstanding the provisions of paragraph (2) of section 6020(b), the execution of a return by the Secretary pursuant to the authority conferred by such section shall not start the running of the period of limitations on assessment and collection.
Amended 1976
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary” wherever appearing.
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(4) Return of excise taxes For purposes of this section, the filing of a return for a specified period on which an entry has been made with respect to a tax imposed under a provision of subtitle D (including a return on which an entry has been made showing no liability for such tax for such period) shall constitute the filing of a return of all amounts of such tax which, if properly paid, would be required to be reported on such return for such period.
Amended 1965
- 1965 Pub. L. 89-44 Pub. L. 89–44, § 810(a), added par. (4).
(c) Exceptions
(1) False return In the case of a false or fraudulent return with the intent to evade tax, the tax may be assessed, or a proceeding in court for collection of such tax may be begun without assessment, at any time.
(2) Willful attempt to evade tax In case of a willful attempt in any manner to defeat or evade tax imposed by this title (other than tax imposed by subtitle A or B), the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time.
(3) No return In the case of failure to file a return, the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time.
(4) Extension by agreement
Amended 1976, 1998
- 1998 Pub. L. 105-206 Pub. L. 105–206, § 3461(b), designated existing provisions as subpar. (A), inserted heading, and added subpar. (B).
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary” wherever appearing.
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(A) In general Where, before the expiration of the time prescribed for the assessment of any tax imposed by this title, except the estate tax provided in chapter 11, both the Secretary and the taxpayer have consented in writing to its assessment after such time, the tax may be assessed at any time prior to the expiration of the period agreed upon. The period so agreed upon may be extended by subsequent agreements in writing made before the expiration of the period previously agreed upon.
Amended 2018
- 2018 Pub. L. 115-141 Pub. L. 115–141, § 205(b), struck out “in this section” after “time prescribed”.
(B) Notice to taxpayer of right to refuse or limit extension The Secretary shall notify the taxpayer of the taxpayer’s right to refuse to extend the period of limitations, or to limit such extension to particular issues or to a particular period of time, on each occasion when the taxpayer is requested to provide such consent.
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(5) Tax resulting from changes in certain income tax or estate tax credits For special rules applicable in cases where the adjustment of certain taxes allowed as a credit against income taxes or estate taxes results in additional tax, see section 905(c) (relating to the foreign tax credit for income tax purposes) and section 2016 (relating to taxes of foreign countries, States, etc., claimed as credit against estate taxes).
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(6) Termination of private foundation status In the case of a tax on termination of private foundation status under section 507, such tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time.
Amended 1959, 1962, 1984
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 211(b)(24)(A), redesignated par. (7) as (6) and struck out former par. (6) which provided that, in the case of any tax imposed under section 802(a) by reason of section 802(b)(3) on account of a termination of the taxpayer as an insurance company or as a life insurance company to which section 815(d)(2)(A) applied, or on account of a distribution by the taxpayer to which section 815(d)(2)(B) applied such tax could be assessed within 3 years after the return was filed (whether or not such return was filed on or after the date prescribed) for the taxable year for which the taxpayer ceased to be an insurance company, the second taxable year for which the taxpayer was not a life insurance company, or the taxable year in which the distribution was actually made, as the case might be.
- 1962 Pub. L. 87-858 Pub. L. 87–858 substituted “802(a)” for “802(a)(1)”.
- 1959 Pub. L. 86-69 Pub. L. 86–69 added par. (6).
(7) Special rule for certain amended returns Where, within the 60-day period ending on the day on which the time prescribed in this section for the assessment of any tax imposed by subtitle A for any taxable year would otherwise expire, the Secretary receives a written document signed by the taxpayer showing that the taxpayer owes an additional amount of such tax for such taxable year, the period for the assessment of such additional amount shall not expire before the day 60 days after the day on which the Secretary receives such document.
Amended 1969, 1984
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 447(a), added par. (7).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 211(b)(24)(A), redesignated former par. (7) as (6).
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 101(g)(2), added par. (7).
(8) Failure to notify Secretary of certain foreign transfers
Amended 1984, 1986, 1997, 2010
- 2010 Pub. L. 111-226 Pub. L. 111–226 designated existing provisions as subpar. (A), inserted heading, and added subpar. (B).
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 513(b), (c), substituted “pursuant to an election under section 1295(b) or under section 1298(f), 6038, 6038A, 6038B, 6038D,” for “under section 6038, 6038A, 6038B,” and “tax return, event,” for “event”.
- 1997 Pub. L. 105-34 Pub. L. 105–34, § 1145(a), amended heading and text of par. (8) generally. Prior to amendment, text read as follows: “In the case of any tax imposed on any exchange or distribution by reason of subsection (a), (d), or (e) of section 367, the time for assessment of such tax shall not expire before the date which is 3 years after the date on which the Secretary is notified of such exchange or distribution under section 6038B(a).”
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1810(g)(3), substituted “exchange or distribution” for “exchange” in two places, and “subsection (a), (d), or (e)” for “subsection (a) or (d)”.
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 131(d)(2), added par. (8).
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(A) In general In the case of any information which is required to be reported to the Secretary pursuant to an election under section 1295(b) or under section 1298(f), 6038, 6038A, 6038B, 6038D, 6046, 6046A, or 6048, the time for assessment of any tax imposed by this title with respect to any tax return, event, or period to which such information relates shall not expire before the date which is 3 years after the date on which the Secretary is furnished the information required to be reported under such section.
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(B) Application to failures due to reasonable cause If the failure to furnish the information referred to in subparagraph (A) is due to reasonable cause and not willful neglect, subparagraph (A) shall apply only to the item or items related to such failure.
(9) Gift tax on certain gifts not shown on return If any gift of property the value of which (or any increase in taxable gifts required under section 2701(d) which) is required to be shown on a return of tax imposed by chapter 12 (without regard to section 2503(b)), and is not shown on such return, any tax imposed by chapter 12 on such gift may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time. The preceding sentence shall not apply to any item which is disclosed in such return, or in a statement attached to the return, in a manner adequate to apprise the Secretary of the nature of such item.
Amended 1990, 1997, 1998
- 1998 Pub. L. 105-206 Pub. L. 105–206, § 6007(e)(2)(A), struck out at end “The value of any item which is so disclosed may not be redetermined by the Secretary after the expiration of the period under subsection (a).”
- 1997 Pub. L. 105-34 Pub. L. 105–34, § 506(b), reenacted par. (9) heading without change and amended text of par. (9) generally. Prior to amendment, text read as follows: “If any gift of property the value of which is determined under section 2701 or 2702 (or any increase in taxable gifts required under section 2701(d)) is required to be shown on a return of tax imposed by chapter 12 (without regard to section 2503(b)), and is not shown on such return, any tax imposed by chapter 12 on such gift may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time. The preceding sentence shall not apply to any item not shown as a gift on such return if such item is disclosed in such return, or in a statement attached to the return, in a manner adequate to apprise the Secretary of the nature of such item.”
- 1990 Pub. L. 101-508 Pub. L. 101–508, § 11602(b), added par. (9).
(10) Listed transactions If a taxpayer fails to include on any return or statement for any taxable year any information with respect to a listed transaction (as defined in section 6707A(c)(2)) which is required under section 6011 to be included with such return or statement, the time for assessment of any tax imposed by this title with respect to such transaction shall not expire before the date which is 1 year after the earlier of—
Amended 2004
- 2004 Pub. L. 108-357 Pub. L. 108–357, § 814(a), added par. (10).
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(A) the date on which the Secretary is furnished the information so required, or
(B) the date that a material advisor meets the requirements of section 6112 with respect to a request by the Secretary under section 6112(b) relating to such transaction with respect to such taxpayer.
Amended 2005
- 2005 Pub. L. 109-135 Pub. L. 109–135 struck out “(as defined in section 6111)” after “material advisor”.
(11) Certain orders of criminal restitution In the case of any amount described in section 6201(a)(4), such amount may be assessed, or a proceeding in court for the collection of such amount may be begun without assessment, at any time.
Amended 2010
- 2010 Pub. L. 111-237 Pub. L. 111–237 added par. (11).
(12) Certain taxes attributable to partnership adjustments In the case of any partnership adjustment determined under subchapter C of chapter 63, the period for assessment of any tax imposed under chapter 2 or 2A which is attributable to such adjustment shall not expire before the date that is 1 year after—
Amended 2018
- 2018 Pub. L. 115-141 Pub. L. 115–141, § 201(b)(2), added par. (12).
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(A) in the case of an adjustment pursuant to the decision of a court in a proceeding brought under section 6234, such decision becomes final, or
(B) in any other case, 90 days after the date on which the notice of the final partnership adjustment is mailed under section 6231.
(d) Request for prompt assessment Except as otherwise provided in subsection (c), (e), or (f), in the case of any tax (other than the tax imposed by chapter 11 of subtitle B, relating to estate taxes) for which return is required in the case of a decedent, or by his estate during the period of administration, or by a corporation, the tax shall be assessed, and any proceeding in court without assessment for the collection of such tax shall be begun, within 18 months after written request therefor (filed after the return is made and filed in such manner and such form as may be prescribed by regulations of the Secretary) by the executor, administrator, or other fiduciary representing the estate of such decedent, or by the corporation, but not after the expiration of 3 years after the return was filed. This subsection shall not apply in the case of a corporation unless—
Amended 1958, 1976
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary” wherever appearing.
- 1958 Pub. L. 85-866 Pub. L. 85–866, § 80(a), (b), substituted in first sentence “subsection (c), (e), or (f)” for “subsection (c)”, designated existing clauses (1) to (3) of second sentence as clause (1) and added clauses (2) and (3).
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(A) such written request notifies the Secretary that the corporation contemplates dissolution at or before the expiration of such 18-month period, (B) the dissolution is in good faith begun before the expiration of such 18-month period, and (C) the dissolution is completed;
(A) such written request notifies the Secretary that a dissolution has in good faith been begun, and (B) the dissolution is completed; or
(3) a dissolution has been completed at the time such written request is made.
(e) Substantial omission of items Except as otherwise provided in subsection (c)—
Amended 1965
- 1965 Pub. L. 89-44 Pub. L. 89–44, § 810(b)(2), substituted “Substantial omission of items” for “Omission from gross income” in heading.
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(1) Income taxes In the case of any tax imposed by subtitle A—
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(A) General rule If the taxpayer omits from gross income an amount properly includible therein and—
(i) such amount is in excess of 25 percent of the amount of gross income stated in the return, or
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(ii) such amount—
Amended 1976
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary” wherever appearing.
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(I) is attributable to one or more assets with respect to which information is required to be reported under section 6038D (or would be so required if such section were applied without regard to the dollar threshold specified in subsection (a) thereof and without regard to any exceptions provided pursuant to subsection (h)(1) thereof), and
(II) is in excess of $5,000,
the tax may be assessed, or a proceeding in court for collection of such tax may be begun without assessment, at any time within 6 years after the return was filed.
Amended 2010
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 513(a)(1), added subpar. (A). Former subpar. (A) redesignated (B).
Cases: United States v. Home Concrete & Supply, LLC, 566 U.S. 478 (2012)
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(B) Determination of gross income For purposes of subparagraph (A)—
Amended 2004, 2010
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 513(a)(2)(A), substituted “Determination of gross income” for “General rule” in heading and “For purposes of subparagraph (A)” for “If the taxpayer omits from gross income an amount properly includible therein which is in excess of 25 percent of the amount of gross income stated in the return, the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time within 6 years after the return was filed. For purposes of this subparagraph” in introductory provisions.
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 513(a)(1), redesignated subpar. (A) as (B). Former subpar. (B) redesignated (C).
- 2004 Pub. L. 108-357 Pub. L. 108–357, § 413(c)(28), reenacted heading without change and amended text of subpar. (B) generally. Prior to amendment, text read as follows: “If the taxpayer omits from gross income an amount properly includible therein under section 551(b) (relating to the inclusion in the gross income of United States shareholders of their distributive shares of the undistributed foreign personal holding company income), the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time within 6 years after the return was filed.”
(i) In the case of a trade or business, the term “gross income” means the total of the amounts received or accrued from the sale of goods or services (if such amounts are required to be shown on the return) prior to diminution by the cost of such sales or services;
(ii) An understatement of gross income by reason of an overstatement of unrecovered cost or other basis is an omission from gross income; and
Amended 2015
- 2015 Pub. L. 114-41 Pub. L. 114–41, § 2005(a)(1), added cl. (ii). Former cl. (ii) redesignated (iii).
(iii) In determining the amount omitted from gross income (other than in the case of an overstatement of unrecovered cost or other basis), there shall not be taken into account any amount which is omitted from gross income stated in the return if such amount is disclosed in the return, or in a statement attached to the return, in a manner adequate to apprise the Secretary of the nature and amount of such item.
Amended 2015
- 2015 Pub. L. 114-41 Pub. L. 114–41 redesignated cl. (ii) as (iii) and inserted “(other than in the case of an overstatement of unrecovered cost or other basis)” after “In determining the amount omitted from gross income”.
(C) Constructive dividends If the taxpayer omits from gross income an amount properly includible therein under section 951(a), the tax may be assessed, or a proceeding in court for the collection of such tax may be done without assessing, at any time within 6 years after the return was filed.
Amended 2010
- 2010 Pub. L. 111-147 Pub. L. 111–147, § 513(a)(1), redesignated subpar. (B) as (C).
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(2) Estate and gift taxes In the case of a return of estate tax under chapter 11 or a return of gift tax under chapter 12, if the taxpayer omits from the gross estate or from the total amount of the gifts made during the period for which the return was filed items includible in such gross estate or such total gifts, as the case may be, as exceed in amount 25 percent of the gross estate stated in the return or the total amount of gifts stated in the return, the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time within 6 years after the return was filed. In determining the items omitted from the gross estate or the total gifts, there shall not be taken into account any item which is omitted from the gross estate or from the total gifts stated in the return if such item is disclosed in the return, or in a statement attached to the return, in a manner adequate to apprise the Secretary of the nature and amount of such item.
Amended 1970, 1976
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary” wherever appearing.
- 1970 Pub. L. 91-614 Pub. L. 91–614 substituted “during the period for which the return was filed” for “during the year”.
(3) Excise taxes In the case of a return of a tax imposed under a provision of subtitle D, if the return omits an amount of such tax properly includible thereon which exceeds 25 percent of the amount of such tax reported thereon, the tax may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time within 6 years after the return is filed. In determining the amount of tax omitted on a return, there shall not be taken into account any amount of tax imposed by chapter 41, 42, 43, or 44 which is omitted from the return if the transaction giving rise to such tax is disclosed in the return, or in a statement attached to the return, in a manner adequate to apprise the Secretary of the existence and nature of such item.
Amended 1965, 1969, 1974, 1976, 1978
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 701(t)(3)(A), substituted “43, or 44” for “or 43”, which required no change in text in view of the identical amendment by section 4(d)(4) of Pub. L. 95–227.
- 1978 Pub. L. 95-227 Pub. L. 95–227, § 4(d)(4), substituted “43, or 44” for “or 43”.
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1307(d)(2)(F)(vi), substituted “chapter 41, 42, or 43” for “chapter 42 or 43”.
- 1974 Pub. L. 93-406 Pub. L. 93–406 inserted reference to chapter 43.
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 101(g)(3), inserted provision excluding, in specified cases, chapter 42 taxes from these considered in determining the amount of taxes omitted from a return.
- 1965 Pub. L. 89-44 Pub. L. 89–44, § 810(b)(1), added par. (3).
(f) Personal holding company tax If a corporation which is a personal holding company for any taxable year fails to file with its return under chapter 1 for such year a schedule setting forth—
Amended 1964
- 1964 Pub. L. 88-272 Pub. L. 88–272 substituted “gross income and adjusted ordinary gross income, described in section 543” for “gross income, described in section 543(a)”.
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(1) the items of gross income and adjusted ordinary gross income, described in section 543, received by the corporation during such year, and
(2) the names and addresses of the individuals who owned, within the meaning of section 544 (relating to rules for determining stock ownership), at any time during the last half of such year more than 50 percent in value of the outstanding capital stock of the corporation,
the personal holding company tax for such year may be assessed, or a proceeding in court for the collection of such tax may be begun without assessment, at any time within 6 years after the return for such year was filed.
(g) Certain income tax returns of corporations
(1) Trusts or partnerships If a taxpayer determines in good faith that it is a trust or partnership and files a return as such under subtitle A, and if such taxpayer is thereafter held to be a corporation for the taxable year for which the return is filed, such return shall be deemed the return of the corporation for purposes of this section.
(2) Exempt organizations If a taxpayer determines in good faith that it is an exempt organization and files a return as such under section 6033, and if such taxpayer is thereafter held to be a taxable organization for the taxable year for which the return is filed, such return shall be deemed the return of the organization for purposes of this section.
Amended 1958
- 1958 Pub. L. 85-866 Pub. L. 85–866, § 81(a), substituted “organization” for “corporation” wherever appearing.
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(3) DISC If a corporation determines in good faith that it is a DISC (as defined in section 992(a)) and files a return as such under section 6011(c)(2) and if such corporation is thereafter held to be a corporation which is not a DISC for the taxable year for which the return is filed, such return shall be deemed the return of a corporation which is not a DISC for purposes of this section.
Amended 1971, 1984
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 801(d)(14), substituted “section 6011(c)(2)” for “section 6011(e)(2)”.
- 1971 Pub. L. 92-178 Pub. L. 92–178, § 504(c), added par. (3).
(h) Net operating loss or capital loss carrybacks In the case of a deficiency attributable to the application to the taxpayer of a net operating loss carryback or a capital loss carryback (including deficiencies which may be assessed pursuant to the provisions of section 6213(b)(3)), such deficiency may be assessed at any time before the expiration of the period within which a deficiency for the taxable year of the net operating loss or net capital loss which results in such carryback may be assessed.
Amended 1958, 1962, 1969, 1978
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 703(n), (p)(2), substituted “section 6213(b)(3)” for “section 6213(b)(2)” and struck out provisions relating to the assessment of a deficiency attributable to the application of a net operating loss carryback.
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 512(e)(1)(A)–(D), substituted “loss or capital loss carrybacks” for “loss carrybacks” in heading, “loss carryback or a capital loss carryback” for “loss carryback,” “operating loss or net capital loss which” for “operating loss which,” “assessed. In the case of a deficiency attributable to the application of a net operating loss carryback, such deficiency may be assessed” for “assessed, or” and “if later than the date prescribed by the preceding sentence” for “whichever is later”.
- 1962 Pub. L. 87-794 Pub. L. 87–794 authorized assessment of a deficiency within 18 months after the date on which the taxpayer files in accordance with section 172(b)(3) a copy of the certification issued under section 317 of the Trade Expansion Act of 1962, whichever is later.
- 1958 Pub. L. 85-866 Pub. L. 85–866, § 81(b), added subsec. (h) and redesignated former subsec. (h) as (i).
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(i) Foreign tax carrybacks In the case of a deficiency attributable to the application to the taxpayer of a carryback under section 904(c) (relating to carryback and carryover of excess foreign taxes) or under section 907(f) (relating to carryback and carryover of disallowed foreign oil and gas taxes), such deficiency may be assessed at any time before the expiration of one year after the expiration of the period within which a deficiency may be assessed for the taxable year of the excess taxes described in section 904(c) or 907(f) which result in such carryback.
Amended 1958, 1960, 1976, 2008
- 2008 Pub. L. 110-343 Pub. L. 110–343, § 402(d), substituted “foreign oil and gas taxes” for “oil and gas extraction taxes”.
- 1976 Pub. L. 94-455 Pub. L. 94–455, §§ 1031(b)(5), 1035(d)(3), substituted “section 904(c)” for Section 904(d)” wherever appearing and inserted “or under section 907(f) (relating to carryback and carryover of disallowed oil and gas extraction taxes)” after “excess foreign taxes)” and “or 907(f)” before “which results in such carryback”.
- 1960 Pub. L. 86-780 Pub. L. 86–780 added subsec. (i) and redesignated former subsec. (i) as (j).
- 1958 Pub. L. 85-866 Pub. L. 85–866, § 81(b), added subsec. (h) and redesignated former subsec. (h) as (i).
(j) Certain credit carrybacks
Amended 1960, 1962, 1966, 1967, 1969, 1978
- 1978 Pub. L. 95-628 Pub. L. 95–628, § 8(c)(1)(A), substituted in heading “Certain credit carrybacks” for “Investment credit carrybacks”, designated existing provision as par. (1), and in par. (1) as so designated, inserted heading “In general” and in text, substituted “credit carryback” for “investment credit carryback” in two places and “unused credit” for “unused investment credit”, inserted reference to other credit carryback, and substituted reference to section 6213(b)(3) for 6213(b)(2), and added par. (2).
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 703(n), substituted “section 6213(b)(3)” for “section 6213(b)(2)”.
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 512(e)(1)(E), substituted “loss carryback or a capital loss carryback” for “loss carryback”.
- 1967 Pub. L. 90-225 Pub. L. 90–225 inserted “, or, with respect to any portion of an investment credit carryback from a taxable year attributable to a net operating loss carryback from a subsequent taxable year, at any time before the expiration of the period within which a deficiency for such subsequent taxable year may be assessed” after “the unused investment credit which results in such carryback may be assessed.”
- 1966 Pub. L. 89-721 Pub. L. 89–721, § 2(f), substituted “investment credit carryback (including deficiencies which may be assessed pursuant to the provisions of section 6213(b)(2))” for “investment credit carryback”.
- 1962 Pub. L. 87-834 Pub. L. 87–834 added subsec. (j) and redesignated former subsec. (j) as (k).
- 1960 Pub. L. 86-780 Pub. L. 86–780 added subsec. (i) and redesignated former subsec. (i) as (j).
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(1) In general In the case of a deficiency attributable to the application to the taxpayer of a credit carryback (including deficiencies which may be assessed pursuant to the provisions of section 6213(b)(3)), such deficiency may be assessed at any time before the expiration of the period within which a deficiency for the taxable year of the unused credit which results in such carryback may be assessed, or with respect to any portion of a credit carryback from a taxable year attributable to a net operating loss carryback, capital loss carryback, or other credit carryback from a subsequent taxable year, at any time before the expiration of the period within which a deficiency for such subsequent taxable year may be assessed.
(2) Credit carryback defined For purposes of this subsection, the term “credit carryback” has the meaning given such term by section 6511(d)(4)(C).
(k) Tentative carryback adjustment assessment period In a case where an amount has been applied, credited, or refunded under section 6411 (relating to tentative carryback and refund adjustments) by reason of a net operating loss carryback, a capital loss carryback, or a credit carryback (as defined in section 6511(d)(4)(C)) to a prior taxable year, the period described in subsection (a) of this section for assessing a deficiency for such prior taxable year shall be extended to include the period described in subsection (h) or (j), whichever is applicable; except that the amount which may be assessed solely by reason of this subsection shall not exceed the amount so applied, credited, or refunded under section 6411, reduced by any amount which may be assessed solely by reason of subsection (h) or (j), as the case may be.
Amended 1962, 1964, 1984, 1986
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(14), substituted “or a credit carryback (as defined in section 6511(d)(4)(C))” for “an investment credit carryback, or a work incentive program carryback, or a new employee credit carryback”.
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), redesignated subsec. (m) as (k).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 211(b)(24)(B), struck out former subsec. (k) which provided that in the case of a deficiency attributable to the application to the taxpayer of section 815(d)(5) (relating to reductions of policyholders surplus account of life insurance companies for certain unused deductions), such deficiency could be assessed at any time before the expiration of the period within which a deficiency for the last taxable year to which the loss described in section 815(d)(5)(A) was carried under section 812(b)(2) could be assessed.
- 1964 Pub. L. 88-571 Pub. L. 88–571 added subsec. (k) and redesignated former subsec. (k) as (l).
- 1962 Pub. L. 87-834 Pub. L. 87–834 added subsec. (j) and redesignated former subsec. (j) as (k).
(l) Special rule for chapter 42 and similar taxes
Amended 1964, 1984, 1986
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), redesignated subsec. (n) as (l) and struck out former subsec. (l) which read “For period of limitations for assessment and collection in the case of a joint income return filed after separate returns have been filed, see section 6013(b)(3) and (4).”
- 1964 Pub. L. 88-571 Pub. L. 88–571 added subsec. (k) and redesignated former subsec. (k) as (l).
(1) In general For purposes of any tax imposed by section 4912, by chapter 42 (other than section 4940), or by section 4975, the return referred to in this section shall be the return filed by the private foundation, plan, trust, or other organization (as the case may be) for the year in which the act (or failure to act) giving rise to liability for such tax occurred. For purposes of section 4940, such return is the return filed by the private foundation for the taxable year for which the tax is imposed.
Amended 1987
- 1987 Pub. L. 100-203 Pub. L. 100–203, § 10714(c), substituted “by section 4912, by chapter 42 (other than section 4940),” for “by chapter 42 (other than section 4940)”.
- 1987 Pub. L. 100-203 Pub. L. 100–203, § 10712(c)(2), substituted “plan, trust, or other organization” for “plan, or trust”.
(2) Certain contributions to section 501(c)(3) organizations In the case of a deficiency of tax of a private foundation making a contribution in the manner provided in section 4942(g)(3) (relating to certain contributions to section 501(c)(3) organizations) attributable to the failure of a section 501(c)(3) organization to make the distribution prescribed by section 4942(g)(3), such deficiency may be assessed at any time before the expiration of one year after the expiration of the period within which a deficiency may be assessed for the taxable year with respect to which the contribution was made.
(3) Certain set-asides described in section 4942(g)(2) In the case of a deficiency attributable to the failure of an amount set aside by a private foundation for a specific project to be treated as a qualifying distribution under the provisions of section 4942(g)(2)(B)(ii), such deficiency may be assessed at any time before the expiration of 2 years after the expiration of the period within which a deficiency may be assessed for the taxable year to which the amount set aside relates.
Amended 1984
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 314(a)(3), substituted “section 4942(g)(2)(B)(ii)” for “section 4942(g)(2)(B)(i)(II)” in subsec. (n)(3), which was redesignated subsec. (l)(3) by Pub. L. 98–369, § 163(b)(1).
(4) Individual retirement plans
Amended 2022
- 2022 Pub. L. 117-328 Pub. L. 117–328 added par. (4).
(A) In general For purposes of any tax imposed by section 4973 or 4974 in connection with an individual retirement plan, the return referred to in this section shall include the income tax return filed by the person on whom the tax under such section is imposed for the year in which the act (or failure to act) giving rise to the liability for such tax occurred.
Cited by 1
(B) Rule in case of individuals not required to file return In the case of a person who is not required to file an income tax return for such year—
(i) the return referred to in this section shall be the income tax return that such person would have been required to file but for the fact that such person was not required to file such return, and
(ii) the 3-year period referred to in subsection (a) with respect to the return shall be deemed to begin on the date by which the return would have been required to be filed (excluding any extension thereof).
(C) Period for assessment in case of income tax return In any case in which the return with respect to a tax imposed by section 4973 is the individual’s income tax return for purposes of this section, subsection (a) shall be applied by substituting a 6-year period in lieu of the 3-year period otherwise referred to in such subsection.
(D) Exception for certain acquisitions of property In the case of any tax imposed by section 4973 that is attributable to acquiring property for less than fair market value, subparagraph (A) shall not apply.
(m) Deficiencies attributable to election of certain credits The period for assessing a deficiency attributable to any election under section 30B(h)(9), 30C(e)(4), 30D(f)(6), 35(g)(11), 40(f), 43, 45B, 45C(d)(4), 45H(g), or 51(j) (or any revocation thereof) shall not expire before the date 1 year after the date on which the Secretary is notified of such election (or revocation).
Amended 1966, 1969, 1971, 1977, 1978, 1984, 1986, 1988, 1990, 1996, 1997, 1998, 2005, 2007, 2008, 2009, 2014, 2015, 2017, 2018, 2022
- 2022 Pub. L. 117-169 Pub. L. 117–169 substituted “30D(f)(6)” for “30D(e)(4)”.
- 2018 Pub. L. 115-141 Pub. L. 115–141, § 401(a)(295), substituted “any election under section 30B(h)(9), 30C(e)(4), 30D(e)(4), 35(g)(11), 40(f), 43, 45B, 45C(d)(4), 45H(g), or 51(j)” for “any election under 30B(h)(9), 30C(e)(5), 30D(e)(4), 35(g)(11), 40(f), 43, 45B, 45C(d)(4), 45H(g), 45S(h), or 51(j)”.
- 2017 Pub. L. 115-97 Pub. L. 115–97 inserted “45S(h),” after “45H(g),”.
- 2015 Pub. L. 114-27 Pub. L. 114–27 inserted “, 35(g)(11)” after “30D(e)(4)”.
- 2014 Pub. L. 113-295 Pub. L. 113–295 struck out “section 30(e)(6),” before “30B(h)(9),”.
- 2009 Pub. L. 111-5 Pub. L. 111–5, § 1142(b)(7), substituted “section 30(e)(6)” for “section 30(d)(4)”.
- 2009 Pub. L. 111-5 Pub. L. 111–5, § 1141(b)(4), which directed amendment of subsec. (m) by substituting “section 30D(e)(4)” for “section 30D(e)(9)”, was executed by substituting “30D(e)(4)” for “30D(e)(9)”, to reflect the probable intent of Congress.
- 2008 Pub. L. 110-343 Pub. L. 110–343, § 205(d)(3), inserted “30D(e)(9),” after “30C(e)(5),”.
- 2007 Pub. L. 110-172 Pub. L. 110–172 inserted “45H(g),” after “45C(d)(4),”.
- 2005 Pub. L. 109-58 Pub. L. 109–58, § 1342(b)(4), inserted “30C(e)(5),” after “30B(h)(9),”.
- 2005 Pub. L. 109-58 Pub. L. 109–58, § 1341(b)(4), inserted “30B(h)(9),” after “30(d)(4),”.
- 1998 Pub. L. 105-206 Pub. L. 105–206, § 6023(27), substituted “election under section 30(d)(4), 40(f), 43, 45B, 45C(d)(4), or 51(j) (or any” for “election under sections 30(d)(4), 40(f), 43, 45B, or 51(j) (or any”.
- 1997 Pub. L. 105-34 Pub. L. 105–34, § 1601(g)(2), provided that sections 1703(n)(8) and 1704(j)(4)(B) of Pub. L. 104–188 shall be applied as if the reference in the directory language to the redesignation by section 1602 referred to the redesignation by section 1702. See 1996 Amendment note below.
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1704(j)(4)(B), substituted “sections 30(d)(4), 40(f)” for “section 40(f)”. See 1997 Amendment note above.
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1703(n)(8), substituted “45B, or 51(j)” for “or 51(j)”. See 1997 Amendment note above.
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1702(e)(3), redesignated subsec. (n) as (m) and substituted “section 40(f), 43, or 51(j)” for “section 40(f) or 51(j)”.
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1702(e)(3)(A), which directed in part that subsec. (m) relating to deficiency attributable to election under section 44B, be struck out, could not be executed because subsec. (m) was previously repealed. See 1990 and 1988 Amendment notes for subsec. (m) and 1984 Amendment note for subsec. (p), below.
- 1990 Pub. L. 101-508 Pub. L. 101–508, § 11511(c)(2), which directed the substitution of “43 or 44B” for “44B” wherever appearing in subsec. (m), could not be executed because subsec. (m) was repealed by Pub. L. 100–418, § 1941(b)(2)(H), and did not contain the term “44B”. However, such term was contained in a prior subsec. (p) which was repealed by Pub. L. 98–369, § 474(r)(39). See 1984 Amendment notes below.
- 1988 Pub. L. 100-418 Pub. L. 100–418 struck out subsec. (m) relating to special rules for windfall profit tax.
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), redesignated subsec. (p) as (m). Former subsec. (m) redesignated (k).
- 1978 Pub. L. 95-628 Pub. L. 95–628, § 8(c)(1)(B), struck out references to subsecs. (o) and (p) in two places.
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 504(b)(3), inserted “and refund” after “tentative carryback”.
- 1977 Pub. L. 95-30 Pub. L. 95–30, § 202(d)(5)(B), inserted references to new employee credit carrybacks and to subsec. (p).
- 1971 Pub. L. 92-178 Pub. L. 92–178, § 601(e)(2), substituted “an investment credit carryback, or a work incentive program carryback” for “or an investment credit carryback” and inserted reference to subsec. (o) in two places, respectively.
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 512(e)(1)(F), substituted “net operating loss carryback, a capital loss carryback, or an investment credit carryback” for “net operating loss carryback or an investment credit carryback”.
- 1966 Pub. L. 89-721 Pub. L. 89–721, § 3(a), added subsec. (m).
Cited by 2
(n) Assessable payment of employer shared responsibility In the case of any assessable payment under section 4980H, the period for assessment shall expire at the end of the 6-year period beginning on the due date for filing the return under section 6056 (or, if later, the date such return was filed) for the calendar year with respect to which such payment is determined.
Amended 1969, 1976, 1978, 1984, 1986, 1988, 1989, 1996, 1997, 2015, 2024
- 2024 Pub. L. 118-168 Pub. L. 118–168 added subsec. (n) and redesignated former subsec. (n) as (o).
- 2015 Pub. L. 114-74 Pub. L. 114–74 substituted “Cross reference” for “Cross references” in heading, struck out par. (1) designation before “For period of limitations”, and struck out pars. (2) and (3) which read as follows:
- 2015 “(2) For extension of period in the case of partnership items (as defined in section 6231(a)(3)), see section 6229.
- 2015 “(3) For declaratory judgment relating to treatment of items other than partnership items with respect to an oversheltered return, see section 6234.”
- 1997 Pub. L. 105-34 Pub. L. 105–34, § 1239(e)(2), which directed the addition of par. (3) to subsec. (o), was executed by adding par. (3) to subsec. (n) to reflect the probable intent of Congress and the redesignation of subsec. (o) as (n) by Pub. L. 104–188, § 1702(e)(3)(A). See 1996 Amendment note below.
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1702(e)(3)(A), redesignated subsec. (o) as (n). Former subsec. (n) redesignated (m).
- 1989 Pub. L. 101-239 Pub. L. 101–239 struck out “, 41(h),” after “section 40(f)”.
- 1988 Pub. L. 100-647 Pub. L. 100–647, § 4008(c)(2), substituted “, 41(h), or 51(j)” for “or 51(j)”.
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(13), added subsec. (n) and redesignated former subsec. (n) as (o).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), added subsec. (n). Former subsec. (n) redesignated (l).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 314(a)(3), substituted “section 4942(g)(2)(B)(ii)” for “section 4942(g)(2)(B)(i)(II)” in subsec. (n)(3), which was redesignated subsec. (l)(3) by Pub. L. 98–369, § 163(b)(1).
- 1978 Pub. L. 95-227 Pub. L. 95–227, § 4(d)(5), in heading inserted “and similar” after “42”, and in par. (1) inserted reference to section 4975 and inserted “, plan, or trust (as the case may be)” after “foundation”.
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 1302(b), added par. (3).
- 1969 Pub. L. 91-172 Pub. L. 91–172, § 101(g)(1), added subsec. (n).
Cited by 1
(o) Material assistance from a prohibited foreign entity In the case of a deficiency attributable to an error with respect to the determination under section 7701(a)(52) for any taxable year, such deficiency may be assessed at any time within 6 years after the return for such year was filed.
Amended 1971, 1976, 1978, 1980, 1982, 1984, 1986, 1988, 1996, 2024, 2025
- 2025 Pub. L. 119-21 Pub. L. 119–21 added subsec. (o) and redesignated former subsec. (o) as (p).
- 2024 Pub. L. 118-168 Pub. L. 118–168 added subsec. (n) and redesignated former subsec. (n) as (o).
- 1996 Pub. L. 104-188 Pub. L. 104–188, § 1702(e)(3)(A), redesignated subsec. (o) as (n). Former subsec. (n) redesignated (m).
- 1988 Pub. L. 100-647 Pub. L. 100–647, § 1008(j)(1), struck out par. (3) which read as follows: “For extension of period in the case of certain contributions in aid of construction, see section 118(c).”
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(13), added subsec. (n) and redesignated former subsec. (n) as (o).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), struck out subsec. (o) which read “For extension of period in the case of partnership items (as defined in section 6231(a)(3), see section 6229.”
- 1982 Pub. L. 97-248 Pub. L. 97–248 substituted “Special rules for partnership items” for “Special rules for partnership items of federally registered partnerships” in heading and, in text, substituted cross reference to section 6229 for extension of period in case of partnership items (as defined in section 6231(a)(3)), for provisions that (1) in the case of any tax imposed by subtitle A with respect to any person, the period for assessing a deficiency attributable to any partnership item of a federally registered partnership would not expire before the later of (A) the date which was 4 years after the date on which the partnership return of the federally registered partnership for the partnership taxable year in which the item arose was filed (or, later, if the date prescribed for filing the return), or (B) if the name or address of such person did not appear on the partnership return, the date which was 1 year after the date on which such information was furnished to the Secretary in such manner and at such place as he might prescribe by regulations, (2) for purposes of this subsec., the term “partnership item” meant (A) any item required to be taken into account for the partnership taxable year under any provision of subchapter K of chapter 1 to the extent that regulations prescribed by the Secretary provided that for purposes of this subtitle such item was more appropriately determined at the partnership level than at the partner level, and (B) any other item to the extent affected by an item described in subpar. (A), (3) the extensions referred to in subsec. (c)(4), insofar as they related to partnership items, could, with respect to any person, be consented to (A) except to the extent the Secretary was otherwise notified by the partnership, by a general partner of the partnership, or (B) by any person authorized to do so by the partnership in writing, and (4) for purposes of this subsec., the term “federally registered partnership” meant, with respect to any partnership taxable year, any partnership (A) interests in which had been offered for sale at any time during such taxable year or a prior taxable year in any offering required to be registered with the Securities and Exchange Commission, or (B) which, at any time during such taxable year or a prior taxable year, had been subject to the annual reporting requirements of the Securities and Exchange Commission which related to the protection of investors in the partnership.
- 1980 Pub. L. 96-222 Pub. L. 96–222, § 102(a)(2)(A), redesignated subsec. (q), as added by section 212(a) of Pub. L. 95–600, relating to special rules for partnership items of Federally registered partnerships, as (o). Former subsec. (o), relating to work incentive program credit carrybacks, was repealed by Pub. L. 95–628.
- 1978 Pub. L. 95-628 Pub. L. 95–628, § 8(c)(1)(C), struck out subsec. (o) which related to work incentive program credit carrybacks.
- 1978 Pub. L. 95-600 Pub. L. 95–600, § 703(n), substituted “section 6213(b)(3)” for “section 6213(b)(2)”.
- 1976 Pub. L. 94-455 Pub. L. 94–455, § 2107(g)(2)(A), inserted “, an investment credit carryback,” after “net operating loss carryback”.
- 1971 Pub. L. 92-178 Pub. L. 92–178, § 601(d)(1), added subsec. (o).
(p) Cross reference For period of limitations for assessment and collection in the case of a joint income return filed after separate returns have been filed, see section 6013(b)(3) and (4).
Amended 1977, 1978, 1980, 1984, 1986, 2025
- 2025 Pub. L. 119-21 Pub. L. 119–21 added subsec. (o) and redesignated former subsec. (o) as (p).
- 1986 Pub. L. 99-514 Pub. L. 99–514, § 1847(b)(12), inserted “(as amended by sections 211, 314, and 474 of this Act)” in directory language of section 163(b)(1) of Pub. L. 98–369, which resulted in no change in text but removed an ambiguity which had resulted from failure of directory language as originally enacted to indicate that amendments of this section by sections 211, 314, and 474 of Pub. L. 98–369 were to be executed before the amendment by section 163(b)(1) of Pub. L. 98–369. See 1984 Amendment notes below.
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 163(b)(1), as amended by Pub. L. 99–514, § 1847(b)(12), redesignated subsec. (p) as (m).
- 1984 Pub. L. 98-369 Pub. L. 98–369, § 474(r)(39), redesignated subsec. (q) as (p). Former subsec. (p), which related to deficiencies attributable to an election under section 44B, was struck out.
- 1980 Pub. L. 96-222 Pub. L. 96–222, § 103(a)(6)(G)(X), redesignated subsec. (q), as added by section 321(b)(2) of Pub. L. 95–600, relating to deficiency attributable to election under section 44B, as (p). Former subsec. (p), relating to new employee credit carrybacks, was repealed by Pub. L. 95–628.
- 1978 Pub. L. 95-628 Pub. L. 95–628, § 8(c)(1)(C), struck out subsec. (p) which related to new employee credit carrybacks.
- 1977 Pub. L. 95-30 Pub. L. 95–30, § 202(d)(4)(A), added subsec. (p).