# Pub. L. 90-225: changes to the Internal Revenue Code 1967-12-27, 81 Stat. 731. Source: . ## Legislative history - Bill: [H.R. 4765](https://www.congress.gov/bill/90th-congress/house-bill/4765) ## § 46: Amount of credit - § 46: Pub. L. 90–225 struck out par. (3) which provided that to the extent that the excess described in par. (1) of this subsection arises by reason of net operating loss carryback, subpar. (A) of par. (1) of this subsection shall not apply. ## § 172: Net operating loss deduction - § 172(b)(1): Pub. L. 90–225, § 3(a)(1)–(3), inserted reference to subpar. (E) in subpars. (A)(i) and (B), and added subpar. (E). - § 172(b)(3): Pub. L. 90–225, § 3(a)(4), added subpars. (E) and (F). ## § 6411: Tentative carryback and refund adjustments - § 6411(a): 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, within a period of 12 months from the end of such subsequent taxable year)” after “within a period of 12 months from the end of such taxable year”. ## § 6501: Limitations on assessment and collection - § 6501(j): 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.” ## § 6511: Limitations on credit or refund - § 6511(d)(4)(A): 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, the period shall be that period which ends with the expiration of the 15th day of the 40th month, or 39th month, in the case of a corporation, following the end of such subsequent taxable year)” after “the unused investment credit which results in such carryback”. ## § 6601: Interest on underpayment, nonpayment, or extensions of time for payment, of tax - § 6601(e)(2): 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, such increase shall not affect the computation of interest under this section for the period ending with the last day of such subsequent taxable year,” after “the investment credit carryback arises”. ## § 6611: Interest on overpayments - § 6611(f)(2): 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, such overpayment shall be deemed not to have been made prior to the close of such subsequent taxable year” after “such investment credit carryback arises”.