# Treas. Reg. § 301.6501(j)-1: Investment credit carryback; taxable years ending after December 31, 1961.

Source: eCFR as of 2026-10-19 <https://www.ecfr.gov/current/title-26/section-301.6501(j)-1>. Interprets 26 U.S.C. § 6501.

With respect to taxable years ending after December 31, 1961, a deficiency attributable to the application to the taxpayer of an investment credit carryback may be assessed at any time before the expiration of the period within which a deficiency for the taxable year of the unused investment credit which results in such carryback may be assessed, or, with respect to any portion of an investment credit carryback from a taxable year attributable to a net operating loss or capital 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. For purposes of this section a deficiency shall include a deficiency which may be assessed pursuant to the provisions of section 6213(b)(2), but only those arising with respect to applications for tentative carryback adjustments filed after November 2, 1966. 

[T.D. 7301, 39 FR 975, Jan. 4, 1974]