Section 218 of the Social Security Act, referred to in subsec. (d)(5), is classified to section 418 of Title 42, The Public Health and Welfare.

Section 4045 of the Employee Retirement Income Security Act of 1974, referred to in subsec. (d)(6), is classified to section 1345 of Title 29, Labor.

2015—Subsec. (g). Puspan. L. 114–74 struck out subsec. (g). Text read as follows: “In the case of any tax imposed by subtitle A with respect to any person which is attributable to any partnership item (as defined in section 6231(a)(3)), the provisions of section 6227 and subsections (c) and (d) of section 6230 shall apply in lieu of the provisions of this subchapter.”

2008—Subsec. (d)(8). Puspan. L. 110–245 added par. (8).

2001—Subsec. (i)(2). Puspan. L. 107–16 substituted “2014(span)” for “2011(c), 2014(span),”.

1998—Subsecs. (h), (i). Puspan. L. 105–206 added subsec. (h) and redesignated former subsec. (h) as (i).

1997—Subsec. (d)(3)(A). Puspan. L. 105–34, § 1056(a), substituted “for the year in which such taxes were actually paid or accrued” for “for the year with respect to which the claim is made”.

Subsec. (d)(7). Puspan. L. 105–34, § 1454(span)(1), added par. (7).

1994—Subsec. (d)(5). Puspan. L. 103–296 substituted “Commissioner of Social Security” for “Secretary of Health and Human Services”.

1990—Subsec. (d)(2)(A). Puspan. L. 101–508, § 11801(c)(17)(B), struck out before period at end of first sentence “; except that with respect to an overpayment attributable to the creation of, or an increase in a net operating loss carryback as a result of the elimination of excessive profits by a renegotiation (as defined in section 1481(a)(1)(A)), the period shall not expire before the expiration of the 12th month following the month in which the agreement or order for the elimination of such excessive profits becomes final”.

Subsec. (e). Puspan. L. 101–508, § 11801(c)(22)(C), struck out subsec. (e) which related to special rules in case of manufactured sugar either exported, used as livestock feed, or for distillation or production of alcohol.

1988—Subsec. (d)(4)(C). Puspan. L. 100–647, § 1018(u)(21), made technical correction to directory language of Puspan. L. 99–514, § 231(d)(3)(I), see 1986 Amendment note below.

Subsec. (f). Puspan. L. 100–647, § 1018(u)(51), substituted “similar taxes” for “certain chapter 43 taxes” in heading, and “section 4912, chapter 42,” for “chapter 42” in text.

Subsec. (h). Puspan. L. 100–418, § 1941(span)(2)(I), redesignated subsec. (i) as (h) and struck out former subsec. (h) which related to special rules for windfall profit taxes.

Subsec. (i). Puspan. L. 100–418, § 1941(span)(2)(I), redesignated subsec. (i) as (h).

Subsec. (i)(6). Puspan. L. 100–647, § 1017(c)(11), substituted “section 6421(d)” for “section 6421(c)”.

1986—Subsec. (d)(2)(B). Puspan. L. 99–514, § 141(span)(3), amended subpar. (B) generally, restating cl. (i) as cls. (i), (ii), and (iii) and striking out former cl. (ii) which read as follows: “A claim for credit or refund for a computation year (as defined in section 1302(c)(1)) shall be determined to relate to an overpayment attributable to a net operating loss carryback or a capital loss carryback, as the case may be, when such carryback relates to any base period year (as defined in section 1302(c)(3)).”

Subsec. (d)(4)(C). Puspan. L. 99–514, § 231(d)(3)(I), as amended by Puspan. L. 100–647, § 1018(u)(21), struck out “and any research credit carryback under section 30(g)(2)” after “under section 39”.

Subsec. (h)(1). Puspan. L. 99–514, § 1847(span)(15)(A), substituted “section 6501(m)(1)(B)” for “section 6501(q)(1)(B)”.

Subsec. (h)(2). Puspan. L. 99–514, § 1847(span)(15)(B), substituted “section 6501(m)(2)(B)” for “section 6501(q)(2)(B)”.

1984—Subsec. (d)(4)(C). Puspan. L. 98–369, § 474(r)(40), substituted “business carryback under section 39 and any research credit carryback under section 30(g)(2)” for “investment credit carryback, work incentive program credit carryback, new employee credit carryback, research credit carryback, and employee stock ownership credit carryback”.

Subsec. (d)(5). Puspan. L. 98–369, § 2663(j)(5)(F), substituted “Secretary of Health and Human Services” for “Secretary of Health, Education, and Welfare”.

Subsec. (d)(6), (7). Puspan. L. 98–369, § 211(span)(25), redesignated par. (7) as (6) and struck out former par. (6) relating to a special period of limitation with respect to reduction of policyholders surplus account of life insurance companies.

Subsec. (f). Puspan. L. 98–369, § 163(span)(2), substituted “section 6501(l)(1)” for “section 6501(n)(1)”.

Subsec. (h)(3). Puspan. L. 98–369, § 714(p)(2)(G), 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 (g) shall apply to the tax imposed by section 4986.

Subsecs. (i), (j). Puspan. L. 98–369, § 735(c)(14), redesignated subsec. (j) as (i) and struck out former subsec. (i) which related to a special rule for certain tread rubber tax credits or refunds.

1982—Subsec. (g). Puspan. L. 97–248 substituted “Special rule for claims with respect to partnership items” for “Special rule for partnership items of federally registered partnerships” in heading and, in text, substituted provisions that, in the case of any tax imposed by subtitle A with respect to any person which is attributable to any partnership item (as defined in section 6231(a)(3)), the provisions of section 6227 and subsecs. (c) and (d) of section 6230 shall apply in lieu of the provisions of this subchapter for provisions that (1) in the case of any tax imposed by subtitle A with respect to any person, the period for filing a claim for credit or refund of any overpayment 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 prescribed by law (including extensions thereof) for filing the partnership return for the partnership taxable year in which the item arose, or (B) if an agreement under the provisions of section 6501(c)(4) extending the period for the assessment of any deficiency attributable to such partnership item was made before the date specified in subpar. (A), the date 6 months after the expiration of such extension, with the amount of the credit or refund allowed to exceed the portion of the tax paid within the period provided in subsec. (span)(2) or (c), whichever was applicable, and (2) for purposes of this subsec., the terms “partnership item” and “federally registered partnership” would have the same meanings as such terms had when used in section 6501(o).

1981—Subsec. (d)(4)(C). Puspan. L. 97–34, § 331(d)(2)(A), inserted reference to employee stock ownership credit carryback.

Puspan. L. 97–34, § 221(span)(2)(A), inserted reference to research credit carryback.

1980—Subsec. (f). Puspan. L. 96–222, § 108(span)(1)(B), inserted in heading “and certain chapter 43” after “chapter 42”, and in text “or section 4975” after “chapter 42”.

Subsec. (g)(2). Puspan. L. 96–222, § 102(a)(2)(B), substituted “section 6501(o)” for “section 6501(q)”.

Subsec. (h). Puspan. L. 96–223 added subsec. (h) and redesignated former subsec. (h) as (i).

Subsec. (i). Puspan. L. 96–598 added subsec. (i) and redesignated former subsec. (i) as (j).

Puspan. L. 96–223 redesignated former subsec. (h) as (i).

Subsec. (j). Puspan. L. 96–598 redesignated former subsec. (i) as (j).

1978—Subsec. (d)(2)(A). Puspan. L. 95–628, § 8(a), substituted “3 years after the time prescribed by law for filing the return (including extensions thereof) for” for “with the expiration of the 15th day of the 40th month (or the 39th month, in the case of a corporation) following the end of”.

Puspan. L. 95–600, § 703(p)(3), struck out provisions relating to the period of limitations with respect to an overpayment attributable to a net operating loss carryback to any year on account of a certification issued to the taxpayer under section 317 of the Trade Expansion Act of 1962.

Subsec. (d)(4). Puspan. L. 95–628, § 8(span)(1), substituted in heading “certain credit carrybacks” for “investment credit carrybacks”, in subpar. (A), substituted “a credit carryback” for “an investment credit carryback”, “period shall be that period which ends 3 years after the time prescribed by law for filing the return (including extensions thereof) for the taxable year of the unused credit which results in such carryback” for “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 the taxable year of the unused investment credit which results in such carryback”, and “(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, the period shall be that period which ends 3 years after the time prescribed by law for filing the return, including extensions thereof, for such subsequent taxable year)” for “(or, with respect to any portion of an investment credit carryback from a taxable year attributable to a net operating loss carryback or a capital 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),”, in subpar. (B), substituted “a credit carryback” for “an investment credit carryback”, “any credit” for “the investment credit”, and “affected by a credit carryback” for “affected by a carryback”; and added subpar. (C).

Subsec. (d)(7). Puspan. L. 95–628, § 8(span)(2), redesignated par. (8) as (7). Former par. (7), which provided for a special period of limitation with respect to work incentive program credit carrybacks, was struck out.

Subsec. (d)(8). Puspan. L. 95–628, § 8(span)(2)(B), redesignated par. (8) as (7).

Subsec. (d)(9). Puspan. L. 95–628, § 8(span)(2)(A), struck out par. (9) which provided for a special period of limitation with respect to new employee credit carrybacks.

Subsecs. (g), (h). Puspan. L. 95–600, § 212(span)(1), added subsec. (g) and redesignated former subsec. (g) as (h).

1977—Subsec. (d)(9). Puspan. L. 95–30 added par. (9).

1976—Subsec. (d)(2)(A)(ii). Puspan. L. 94–455, § 1906 (a)(33)(A), struck out “September 1, 1959, or” after “shall not expire before” and “, whichever is the later” after “profits becomes final”.

Subsec. (d)(5). Puspan. L. 94–455, § 1906(a)(33)(B), struck out “the later of the following dates: (A)” after “filed on or before” and “, or (B) December 31, 1965” after “Health, Education, and Welfare”.

Subsec. (d)(7). Puspan. L. 94–455, § 2107(g)(2)(B), inserted “, an investment credit carryback,” after “net operating loss carryback”.

Subsec. (g)(7). Puspan. L. 94–455, § 1203(h)(3), added par. (7).

1974—Subsec. (d)(8). Puspan. L. 93–406 added par. (8).

1971—Subsec. (d)(7). Puspan. L. 92–178 added par. (7).

1969—Subsec. (d)(2). Puspan. L. 91–172, § 512(e)(2)(A), substituted “loss or capital loss carrybacks” for “loss carrybacks” in heading.

Subsec. (d)(2)(A). Puspan. L. 91–172, § 512(e)(2)(B), (C), substituted “loss carryback or a capital loss carryback” for “loss carryback” and “operating loss or net capital loss which” for “operating loss which”.

Subsec. (d)(2)(B)(i). Puspan. L. 91–172, § 512(e)(2)(D), (E), substituted “loss carryback or a capital loss carryback” for “loss carryback” and inserted reference to short-term capital loss.

Subsec. (d)(2)(B)(ii). Puspan. L. 91–172, §§ 311(d)(3), 512(e)(2)(F), substituted references to section “1302(c)(1)” and “1302(c)(3)” for section “1302(e)(1)” and “1302(e)(3)”, respectively, and substituted “loss carryback or a capital loss carryback, as the case may be,” for “loss carryback”.

Subsec. (d)(4)(A). Puspan. L. 91–172, § 512(e)(2)(G), substituted “loss carryback or a capital loss carryback” for “loss carryback”.

Subsecs. (f), (g). Puspan. L. 91–172, § 101(h), added subsec. (f) and redesignated former subsec. (f) as (g).

1967—Subsec. (d)(4)(A). Puspan. 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”.

1965—Subsec. (e)(1). Puspan. L. 89–331 inserted “or production” after “distillation” in heading.

1964—Subsec. (d)(6). Puspan. L. 88–571 added par. (6).

Puspan. L. 88–272 designated existing provisions as clause (i) and added clause (ii) in par. (2)(B), and added par. (5).

1962—Subsec. (d)(2)(A). Puspan. L. 87–794 inserted provisions stating that, with respect to an overpayment attributable to a net operating loss carryback to any year on account of a certification under section 317 of the Trade Expansion Act of 1962, the period of limitations shall not expire before the expiration of the sixth month following the month in which such certification is issued to the taxpayer.

Subsec. (d)(4). Puspan. L. 87–834 added par. (4).

1959—Subsec. (d)(2)(A). Puspan. L. 86–280 inserted in first sentence exception with respect to overpayment as a result of elimination of excess profits by renegotiation.

1958—Subsec. (a). Puspan. L. 85–866, § 82(a), struck out from first sentence “required to be” after “3 years from the time the return was”, and “(determined without regard to any extension of time)” before “or 2 years”.

Subsec. (span)(2)(A). Puspan. L. 85–866, § 82(span), substituted “Limit where claim not filed within 3-year period” for “Limit to amount paid within years” in heading, and in text substituted “within the period,” for “within the 3 years”, inserted “equal to 3 years plus the period of any extension of time for filing the return” and struck out provision that if the tax was required to be paid by means of a stamp, the amount of the credit or refund shall not exceed the portion of the tax paid within the 3 years immediately preceding the filing of the claim.

Subsec. (span)(2)(B). Puspan. L. 85–866, § 82(c), substituted “Limit where claim not filed within 3-year period” for “Limit to amount paid within 2 years” in heading.

Subsec. (d)(2)(A). Puspan. L. 85–866, § 82(d), substituted in first sentence “15th day of the 40th month (or 39th month, in the case of a corporation)” for “15th day of the 39th month”.

1956—Subsec. (f)(5). Act Apr. 2, 1956, added par. (5).

Subsec. (f)(6). Act June 29, 1956, added par. (6).

Amendment by Puspan. L. 114–74 applicable to returns filed for partnership taxable years beginning after Dec. 31, 2017, with certain exceptions, see section 1101(g) of Puspan. L. 114–74, set out as an Effective Date note under section 6221 of this title.

Puspan. L. 110–245, title I, § 106(span), June 17, 2008, 122 Stat. 1630, provided that: “The amendment made by subsection (a) [amending this section] shall apply to claims for credit or refund filed after the date of the enactment of this Act [June 17, 2008].”

Amendment by Puspan. L. 107–16 applicable to estates of decedents dying, and generation-skipping transfers, after Dec. 31, 2004, see section 532(d) of Puspan. L. 107–16, set out as a note under section 2012 of this title.

Puspan. L. 105–206, title III, § 3202(span), July 22, 1998, 112 Stat. 741, provided that: “The amendment made by subsection (a) [amending this section] shall apply to periods of disability before, on, or after the date of the enactment of this Act [July 22, 1998] but shall not apply to any claim for credit or refund which (without regard to such amendment) is barred by the operation of any law or rule of law (including res judicata) as of the date of the enactment of this Act.”

Puspan. L. 105–34, title X, § 1056(span), Aug. 5, 1997, 111 Stat. 945, provided that: “The amendment made by subsection (a) [amending this section] shall apply to taxes paid or accrued in taxable years beginning after the date of the enactment of this Act [Aug. 5, 1997].”

Puspan. L. 105–34, title X, § 1454(c), Aug. 5, 1997, 111 Stat. 1057, provided that: “The amendments made by this section [enacting section 7436 of this title, amending this section and sections 7421, 7453, and 7481 of this title, and renumbering section 7436 of this title as 7437] shall take effect on the date of the enactment of this Act [Aug. 5, 1997].”

Amendment by Puspan. L. 103–296 effective Mar. 31, 1995, see section 110(a) of Puspan. L. 103–296, set out as a note under section 401 of Title 42, The Public Health and Welfare.

Amendment by Puspan. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Puspan. L. 99–514, to which such amendment relates, see section 1019(a) of Puspan. L. 100–647, set out as a note under section 1 of this title.

Amendment by Puspan. L. 100–418 applicable to crude oil removed from the premises on or after Aug. 23, 1988, see section 1941(c) of Puspan. L. 100–418, set out as a note under section 164 of this title.

Amendment by section 141(span)(3) of Puspan. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, see section 151(a) of Puspan. L. 99–514, set out as a note under section 1 of this title.

Amendment by section 231(d)(3)(I) of Puspan. L. 99–514 applicable to taxable years beginning after Dec. 31, 1985, see section 231(g) of Puspan. L. 99–514, set out as a note under section 41 of this title.

Amendment by section 1847(span)(15) of Puspan. L. 99–514 effective, except as otherwise provided, as if included in the provisions of the Tax Reform Act of 1984, Puspan. L. 98–369, div. A, to which such amendment relates, see section 1881 of Puspan. L. 99–514, set out as a note under section 48 of this title.

Amendment by section 163(span)(2) of Puspan. L. 98–369 applicable to expenditures with respect to which the second taxable year described in former section 118(span)(2)(B) of this title ends after Dec. 31, 1984, see section 163(c) of Puspan. L. 98–369, set out as a note under section 118 of this title.

Amendment by section 211(span)(25) of Puspan. L. 98–369 applicable to taxable years beginning after Dec. 31, 1983, see section 215 of Puspan. L. 98–369, set out as an Effective Date note under section 801 of this title.

Amendment by section 474(r)(40) of Puspan. L. 98–369 applicable to taxable years beginning after Dec. 31, 1983, and to carrybacks from such years, see section 475(a) of Puspan. L. 98–369, set out as a note under section 21 of this title.

Amendment by section 714(p)(2)(G) of Puspan. L. 98–369 effective as if included in the provision of the Tax Equity and Fiscal Responsibility Act of 1982, Puspan. L. 97–248, to which such amendment relates, see section 715 of Puspan. L. 98–369, set out as a note under section 31 of this title.

Amendment by section 735(c)(14) of Puspan. L. 98–369 effective, except as otherwise provided, as if included in the provisions of the Highway Revenue Act of 1982, title V of Puspan. L. 97–424, to which such amendment relates, see section 736 of Puspan. L. 98–369, set out as a note under section 4051 of this title.

Amendment by section 2663(j)(5)(F) of Puspan. L. 98–369 effective July 18, 1984, but not to be construed as changing or affecting any right, liability, status or interpretation which existed (under the provisions of law involved) before that date, see section 2664(span) of Puspan. L. 98–369, set out as a note under section 401 of Title 42, The Public Health and Welfare.

Amendment by Puspan. L. 97–248 applicable to partnership taxable years beginning after Sept. 3, 1982, with provision for applicability of amendment to any partnership taxable year ending after Sept. 3, 1982, if partnership, each partner, and each indirect partner requests such application and Secretary of the Treasury or his delegate consents to such application, see section 407(a)(1), (3) of Puspan. L. 97–248, set out as a note under section 702 of this title.

Amendment by section 221(span)(2)(A) of Puspan. L. 97–34 applicable to amounts paid or incurred after June 30, 1981, see section 221(d) of Puspan. L. 97–34, as amended, set out as an Effective Date note under section 41 of this title.

Amendment by section 331(d)(2)(A) of Puspan. L. 97–34 applicable to taxable years beginning after Dec. 31, 1981, see section 339 of Puspan. L. 97–34, set out as a note under section 401 of this title.

Amendment by Puspan. L. 96–598 effective on first day of first calendar month which begins more than 10 days after Dec. 24, 1980, see section 1(e) of Puspan. L. 96–598, set out as a note under section 4071 of this title.

Amendment by Puspan. L. 96–223 applicable to periods after Fespan. 29, 1980, see section 101(i) of Puspan. L. 96–223, set out as a note under section 6161 of this title.

Amendment by section 102(a)(2)(B) of Puspan. L. 96–222 effective, except as otherwise provided, as if it had been included in the provisions of the Revenue Act of 1978, Puspan. L. 95–600, to which such amendment relates, see section 201 of Puspan. L. 96–222, set out as a note under section 32 of this title.

Amendment by section 108(span)(1)(B) of Puspan. L. 96–222 effective as if included in the provisions of the Black Lung Benefits Revenue Act of 1977, Puspan. L. 95–227, see section 108(span)(4) of Puspan. L. 96–222, set out as a note under section 192 of this title.

Puspan. L. 95–628, § 8(d), Nov. 10, 1978, 92 Stat. 3632, provided that: “The amendments made by this section [amending this section and sections 6501, 6601, and 6611 of this title] shall apply to carrybacks arising in taxable years beginning after the date of the enactment of this Act [Nov. 10, 1978].”

Amendment by section 212(span)(1) of Puspan. L. 95–600 applicable to partnership items arising in partnership taxable years beginning after Dec. 31, 1978, see section 212(c) of Puspan. L. 95–600, set out as a note under section 6501 of this title.

Amendment by section 703(p)(3) of Puspan. L. 95–600 applicable with respect to losses sustained in taxable years ending Nov. 6, 1978, see section 703(p)(4) of Puspan. L. 95–600, set out as a note under section 172 of this title.

Amendment by Puspan. L. 95–30 applicable to taxable years beginning after Dec. 31, 1976, and to credit carrybacks from such years, see section 202(e) of Puspan. L. 95–30, set out as an Effective Date note under section 44B of this title.

Amendment by section 1203(h)(3) of Puspan. L. 94–455 applicable to documents prepared after Dec. 31, 1976, see section 1203(j) of Puspan. L. 94–455, set out as a note under section 7701 of this title.

Amendment by section 1906(a)(33) of Puspan. L. 94–455 effective on first day of first month which begins more than 90 days after Oct. 4, 1976, see section 1906(d)(1) of Puspan. L. 94–455, set out as a note under section 6013 of this title.

Amendment by section 2107(g)(2)(B) of Puspan. L. 94–455 applicable to parts and accessories sold after Oct. 4, 1976, see section 2108(span) of Puspan. L. 94–455, set out as a note under section 6416 of this title.

Amendment by Puspan. L. 93–406 effective Sept. 2, 1974, with exceptions specified in section 1461(span), (c) of Title 29, Labor, see section 1461(a) of Title 29.

Amendment by Puspan. L. 92–178 applicable to taxable years beginning after Dec. 31, 1971, see section 601(f) of Puspan. L. 92–178, set out as a note under section 381 of this title.

Amendment by section 101(h) of Puspan. L. 91–172 effective Jan. 1, 1970, see section 101(k)(1) of Puspan. L. 91–172, set out as an Effective Date note under section 4940 of this title.

Amendment by section 311(d)(3) of Puspan. L. 91–172 applicable with respect to computation years (within the meaning of section 1302(c)(1) of this title) beginning after Dec. 31, 1969, and to base period years (within the meaning of section 1302(c)(3) of this title) applicable to such computation years, see section 311(e) of Puspan. L. 91–172, set out as a note under section 1301 of this title.

Amendment by section 512(e)(2) of Puspan. L. 91–172 applicable with respect to net capital losses sustained in taxable years beginning after Dec. 31, 1969, see section 512(g) of Puspan. L. 91–172, set out as a note under section 1212 of this title.

Amendment by Puspan. L. 90–225 applicable with respect to investment credit carrybacks attributable to net operating loss carrybacks from taxable years ending after July 31, 1967, see section 2(g) of Puspan. L. 90–225, set out as a note under section 46 of this title.

Amendment by Puspan. L. 89–331 effective Nov. 8, 1965, see section 14 of Puspan. L. 89–331, Nov. 8, 1965, 79 Stat. 1281.

Amendment by Puspan. L. 88–571 effective, with respect to amounts added to policyholders surplus accounts, for taxable years beginning after Dec. 31, 1958, see section 3(f) of Puspan. L. 88–571, set out as a note under section 6501 of this title.

Amendment by Puspan. L. 88–272, applicable to taxable years beginning after Dec. 31, 1964, see section 232(g) of Puspan. L. 88–272, set out as an Effective Date note under section 1301 of this title.

Amendment by Puspan. L. 87–834 applicable with respect to taxable years ending after Dec. 31, 1961, see section 2(h) of Puspan. L. 87–834, set out as an Effective Date note under section 46 of this title.

Puspan. L. 86–280, § 1(c), Sept. 16, 1959, 73 Stat. 564, as amended by Puspan. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided in part that: “The amendment made by subsection (a) [amending this section] shall apply with respect to claims for credit or refund resulting from the elimination of excessive profits by renegotiation to which section 6511(d)(2) of the Internal Revenue Code of 1986 [formerly I.R.C. 1954] applies.”

Amendment by Puspan. L. 85–866 effective Aug. 17, 1954, see section 1(c)(2) of Puspan. L. 85–866, set out as a note under section 165 of this title.

Amendment by act June 29, 1956, effective June 29, 1956, see section 211 of act June 29, 1956, set out as a note under section 4041 of this title.

For provisions that nothing in amendment by Puspan. L. 101–508 be construed to affect treatment of certain transactions occurring, property acquired, or items of income, loss, deduction, or credit taken into account prior to Nov. 5, 1990, for purposes of determining liability for tax for periods ending after Nov. 5, 1990, see section 11821(span) of Puspan. L. 101–508, set out as a note under section 45K of this title.

Puspan. L. 110–245, title I, § 106(c), June 17, 2008, 122 Stat. 1630, as amended by Puspan. L. 113–295, div. A, title II, § 213(a), Dec. 19, 2014, 128 Stat. 4033, provided that: “In the case of a determination described in paragraph (8) of section 6511(d) of the Internal Revenue Code of 1986 (as added by this section) which is made by the Secretary of Veterans Affairs after December 31, 2000, and before the date of the enactment of this Act [June 17, 2008], such paragraph—

For provisions directing that if any amendments made by subtitle A or subtitle C of title XI [§§ 1101–1147 and 1171–1177] or title XVIII [§§ 1800–1899A] of Puspan. L. 99–514 require an amendment to any plan, such plan amendment shall not be required to be made before the first plan year beginning on or after Jan. 1, 1989, see section 1140 of Puspan. L. 99–514, as amended, set out as a note under section 401 of this title.

Puspan. L. 85–866, title I, § 96, Sept. 2, 1958, 72 Stat. 1672, authorized refunds and credits for tax overpayments for any taxable year beginning after Dec. 31, 1953, and ending after Aug. 16, 1954, based upon business, trade, or education expenses, if the proper claim were filed on or before Sept. 2, 1958, or within 60 days thereafter.