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Internal Revenue Code · 26 U.S.C.

§ 6611. Interest on overpayments

In force Text current through Public Law 119-121 (October 9, 2026) release point 119-121

Official text, no changes From the Office of the Law Revision Counsel, release point 119-121 (current through Public Law 119-121 (October 9, 2026)). Compare it with the official text at uscode.house.gov (external site).

Cite as 26 U.S.C. § 6611

At a glance

Read from the text, the source credit and the official notes. Not part of the law.

Status
In force
Enacted
September 2, 1958 by Pub. L. 85–866
Last amended
March 18, 2010 by Pub. L. 111–147
Amendments
21 dated changes in the source credit
Length
8 subsections · 1,586 words · about 7 min to read
Defines
3 terms
Cross-references
cites 6; cited by 8 Code sections and 21 other regulations
Regulations
1 issued under this section
(a) Rate

Interest shall be allowed and paid upon any overpayment in respect of any internal revenue tax at the overpayment rate established under section 6621.

(b) Period Such interest shall be allowed and paid as follows:
(1) Credits

In the case of a credit, from the date of the overpayment to the due date of the amount against which the credit is taken.

(2) Refunds

In the case of a refund, from the date of the overpayment to a date (to be determined by the Secretary) preceding the date of the refund check by not more than 30 days, whether or not such refund check is accepted by the taxpayer after tender of such check to the taxpayer. The acceptance of such check shall be without prejudice to any right of the taxpayer to claim any additional overpayment and interest thereon.

(3) Late returns

Notwithstanding paragraph (1) or (2) in the case of a return of tax which is filed after the last date prescribed for filing such return (determined with regard to extensions), no interest shall be allowed or paid for any day before the date on which the return is filed.

[(c) Repealed. Pub. L. 85–866, title I, § 83(c), Sept. 2, 1958, 72 Stat. 1664]
(d) Advance payment of tax, payment of estimated tax, and credit for income tax withholding

The provisions of section 6513 (except the provisions of subsection (c) thereof, applicable in determining the date of payment of tax for purposes of determining the period of limitation on credit or refund, shall be applicable in determining the date of payment for purposes of subsection (a).

(e) Disallowance of interest on certain overpayments
(1) Refunds within 45 days after return is filed

If any overpayment of tax imposed by this title is refunded within 45 days after the last day prescribed for filing the return of such tax (determined without regard to any extension of time for filing the return) or, in the case of a return filed after such last date, is refunded within 45 days after the date the return is filed, no interest shall be allowed under subsection (a) on such overpayment.

(2) Refunds after claim for credit or refund If—
(A) the taxpayer files a claim for a credit or refund for any overpayment of tax imposed by this title, and
(B) such overpayment is refunded within 45 days after such claim is filed,
no interest shall be allowed on such overpayment from the date the claim is filed until the day the refund is made.
(3) IRS initiated adjustments

If an adjustment initiated by the Secretary, results in a refund or credit of an overpayment, interest on such overpayment shall be computed by subtracting 45 days from the number of days interest would otherwise be allowed with respect to such overpayment.

(4) Certain withholding taxes

In the case of any overpayment resulting from tax deducted and withheld under chapter 3 or 4, paragraphs (1), (2), and (3) shall be applied by substituting “180 days” for “45 days” each place it appears.

(f) Refund of income tax caused by carryback or adjustment for certain unused deductions
(1) Net operating loss or capital loss carryback

For purposes of subsection (a), if any overpayment of tax imposed by subtitle A results from a carryback of a net operating loss or net capital loss, such overpayment shall be deemed not to have been made prior to the filing date for the taxable year in which such net operating loss or net capital loss arises.

(2) Foreign tax credit carrybacks

For purposes of subsection (a), if any overpayment of tax imposed by subtitle A results from a carryback of tax paid or accrued to foreign countries or possessions of the United States, such overpayment shall be deemed not to have been made before the filing date for the taxable year in which such taxes were in fact paid or accrued, or, with respect to any portion of such credit carryback from a taxable year attributable to a net operating loss carryback or a capital loss carryback from a subsequent taxable year, such overpayment shall be deemed not to have been made before the filing date for such subsequent taxable year.

(3) Certain credit carrybacks
(A) In general

For purposes of subsection (a), if any overpayment of tax imposed by subtitle A results from a credit carryback, such overpayment shall be deemed not to have been made before the filing date for the taxable year in which such credit carryback arises, 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, such overpayment shall be deemed not to have been made before the filing date for such subsequent taxable year.

(B) Credit carryback defined

For purposes of this paragraph, the term “credit carryback” has the meaning given such term by section 6511(d)(4)(C).

(4) Special rules for paragraphs (1), (2), and (3)
(A) Filing date

For purposes of this subsection, the term “filing date” means the last date prescribed for filing the return of tax imposed by subtitle A for the taxable year (determined without regard to extensions).

(B) Coordination with subsection (e)
(i) In general For purposes of subsection (e)—
(I) any overpayment described in paragraph (1), (2), or (3) shall be treated as an overpayment for the loss year,
(II) such subsection shall be applied with respect to such overpayment by treating the return for the loss year as not filed before claim for such overpayment is filed.
(ii) Loss year For purposes of this subparagraph, the term “loss year” means—
(I) in the case of a carryback of a net operating loss or net capital loss, the taxable year in which such loss arises,
(II) in the case of a carryback of taxes paid or accrued to foreign countries or possessions of the United States, the taxable year in which such taxes were in fact paid or accrued (or, with respect to any portion of such carryback from a taxable year attributable to a net operating loss carryback or a capital loss carryback from a subsequent taxable year, such subsequent taxable year), and
(III) in the case of a credit carryback (as defined in paragraph (3)(B)), the taxable year in which such credit carryback arises (or, with respect to any portion of a credit carryback from a taxable year attributable to a net operating loss carryback, a capital loss carryback, or other credit carryback from a subsequent taxable year, such subsequent taxable year).
(C) Application of subparagraph (B) where section 6411(a) claim filed For purposes of subparagraph (B)(i)(II), if a taxpayer—
(i) files a claim for refund of any overpayment described in paragraph (1), (2), or (3) with respect to the taxable year to which a loss or credit is carried back, and
(ii) subsequently files an application under section 6411(a) with respect to such overpayment,
then the claim for overpayment shall be treated as having been filed on the date the application under section 6411(a) was filed.
(g) No interest until return in processible form
(1) For purposes of subsections (b)(3) and (e), a return shall not be treated as filed until it is filed in processible form.
(2) For purposes of paragraph (1), a return is in a processible form if—
(A) such return is filed on a permitted form, and
(B) such return contains—
(i) the taxpayer’s name, address, and identifying number and the required signature, and
(ii) sufficient required information (whether on the return or on required attachments) to permit the mathematical verification of tax liability shown on the return.
(h) Prohibition of administrative review

For prohibition of administrative review, see section 6406.

(Aug. 16, 1954, ch. 736, 68A Stat. 819; Pub. L. 85–866, title I, §§ 42(b), 83(b), (c), Sept. 2, 1958, 72 Stat. 1640, 1664; Pub. L. 87–834, § 2(e)(4), Oct. 16, 1962, 76 Stat. 972; Pub. L. 88–571, § 3(e), Sept. 2, 1964, 78 Stat. 858; Pub. L. 89–721, § 1(a), Nov. 2, 1966, 80 Stat. 1150; Pub. L. 90–225, § 2(f), Dec. 27, 1967, 81 Stat. 732; Pub. L. 91–172, title V, § 512(e)(4), Dec. 30, 1969, 83 Stat. 641; Pub. L. 92–178, title VI, § 601(d)(4), Dec. 10, 1971, 85 Stat. 559; Pub. L. 93–17, § 3(i)(2), Apr. 10, 1973, 87 Stat. 19; Pub. L. 93–625, § 7(a)(2)(C), Jan. 3, 1975, 88 Stat. 2115; Pub. L. 94–455, title XIX, § 1904(b)(10)(A)(iv), 1906(b)(13)(A), title XXI, § 2107(g)(2)(D), Oct. 4, 1976, 90 Stat. 1817, 1834, 1904; Pub. L. 95–30, title II, § 202(d)(4)(D), May 23, 1977, 91 Stat. 150; Pub. L. 95–628, § 8(c)(3), Nov. 10, 1978, 92 Stat. 3632; Pub. L. 96–223, title I, § 101(h), Apr. 2, 1980, 94 Stat. 254; Pub. L. 97–248, title III, § 346(a)–(c)(1), Sept. 3, 1982, 96 Stat. 636, 637; Pub. L. 98–369, div. A, title II, § 211(b)(27), title VII, § 714(n)(2)(A), July 18, 1984, 98 Stat. 757, 963; Pub. L. 99–514, title XV, § 1511(c)(13), Oct. 22, 1986, 100 Stat. 2745; Pub. L. 100–418, title I, § 1941(b)(2)(L), Aug. 23, 1988, 102 Stat. 1323; Pub. L. 103–66, title XIII, § 13271(a), Aug. 10, 1993, 107 Stat. 541; Pub. L. 105–34, title X, § 1055(b), Aug. 5, 1997, 111 Stat. 944; Pub. L. 105–206, title VI, § 6010(l), July 22, 1998, 112 Stat. 816; Pub. L. 106–554, § 1(a)(7) [title III, § 319(20)], Dec. 21, 2000, 114 Stat. 2763, 2763A–647; Pub. L. 111–147, title V, § 501(b), Mar. 18, 2010, 124 Stat. 105.)

Terms defined here

Where the text says “the term … means”. Select a term to jump to its definition.

Regulations under this section

Treasury regulations (26 CFR) issued under § 6611

Cross-references

Computed from the citations in the text of Title 26 and 26 CFR.

This section cites 6 other sections

Cited by 8 Code sections

Cited in 21 regulations not issued under it

Amendment history

From the source credit and the official notes, newest first.

  1. Amended by Pub. L. 111–147Parts changed in 2010: (e)(4)
  2. Amended by Pub. L. 106–554Parts changed in 2000: (g)(1)
  3. Amended by Pub. L. 105–206Parts changed in 1998: (g)(1)
  4. Amended by Pub. L. 105–34Parts changed in 1997: (f)(2) (f)(4) (f)(4)(B)(i)(I) (f)(4)(B)(ii)(II) (f)(4)(B)(ii)(III) (f)(4)(C)(i) (g)
  5. Amended by Pub. L. 103–66Parts changed in 1993: (e)
  6. Amended by Pub. L. 100–418Parts changed in 1988: (h)
  7. Amended by Pub. L. 99–514Parts changed in 1986: (a)
  8. Amended by Pub. L. 98–369Parts changed in 1984: (f)(3)(C) (f)(4)
  9. Amended by Pub. L. 97–248Parts changed in 1982: (b)(3) (f)(1) (f)(2)(A) (f)(3) (g) (i)
  10. Amended by Pub. L. 96–223Parts changed in 1980: (h)
  11. Amended by Pub. L. 95–628Parts changed in 1978: (f)(2) (f)(4)
  12. Amended by Pub. L. 95–30Parts changed in 1977: (f)(5)
  13. Amended by Pub. L. 94–455Parts changed in 1976: (b) (f)(4) (h)
  14. Amended by Pub. L. 93–625Parts changed in 1975: (a)
  15. Amended by Pub. L. 93–17Parts changed in 1973: (h)
  16. Amended by Pub. L. 92–178Parts changed in 1971: (f)(4)
  17. Amended by Pub. L. 91–172Parts changed in 1969: (f)(1) (f)(2)
  18. Amended by Pub. L. 90–225Parts changed in 1967: (f)(2)
  19. Amended by Pub. L. 89–721Parts changed in 1966: (e)
  20. Amended by Pub. L. 88–571Parts changed in 1964: (f)
  21. Amended by Pub. L. 87–834Parts changed in 1962: (f)
  22. Enacted by Pub. L. 85–866Parts changed in 1958: (b)(1) (c) (g)

Where it sits in the Code

  1. Subtitle F Procedure and Administration
  2. Chapter 67 INTEREST
  3. Subchapter B Interest on Overpayments

Nearby sections

Official notes

Show the Law Revision Counsel's notes (amendments, effective dates)

Editorial Notes

Amendments

2010—Subsec. (e)(4). Pub. L. 111–147 added par. (4).

2000—Subsec. (g)(1). Pub. L. 106–554 struck out comma after “(b)(3)”.

1998—Subsec. (g)(1). Pub. L. 105–206 substituted “and (e)” for “(e), and (h)”.

1997—Subsec. (f)(2), (3). Pub. L. 105–34, § 1055(b)(1), added par. (2) and redesignated former par. (2) as (3). Former par. (3) redesignated (4).

Subsec. (f)(4). Pub. L. 105–34, § 1055(b)(1), (2)(A)(i), redesignated par. (3) as (4) and substituted “paragraphs (1), (2), and (3)” for “paragraphs (1) and (2)” in heading.

Subsec. (f)(4)(B)(i)(I). Pub. L. 105–34, § 1055(b)(2)(A), substituted “paragraph (1), (2), or (3)” for “paragraph (1) or (2)”.

Subsec. (f)(4)(B)(ii)(II). Pub. L. 105–34, § 1055(b)(2)(B), added subcl. (II). Former subcl. (II) redesignated (III).

Subsec. (f)(4)(B)(ii)(III). Pub. L. 105–34, § 1055(b)(2)(B), (C), redesignated subcl. (II) as (III) and inserted “(as defined in paragraph (3)(B))” after “case of a credit carryback”.

Subsec. (f)(4)(C)(i). Pub. L. 105–34, § 1055(b)(2)(A), substituted “paragraph (1), (2), or (3)” for “paragraph (1) or (2)”.

Subsecs. (g) to (i). Pub. L. 105–34, § 1055(b)(2)(D), redesignated subsecs. (h) and (i) as (g) and (h), respectively, and struck out former subsec. (g) which read as follows:

“(g) Refund of Income Tax Caused by Carryback of Foreign Taxes.—For purposes of subsection (a), if any overpayment of tax results from a carryback of tax paid or accrued to foreign countries or possessions of the United States, such overpayment shall be deemed not to have been paid or accrued prior to the filing date (as defined in subsection (f)(3)) for the taxable year under this subtitle in which such taxes were in fact paid or accrued.”

1993—Subsec. (e). Pub. L. 103–66 amended heading and text of subsec. (e) generally. Prior to amendment, text read as follows: “If any overpayment of tax imposed by subtitle A is refunded within 45 days after the last date prescribed for filing the return of such tax (determined without regard to any extension of time for filing the return) or, in case the return is filed after such last date, is refunded within 45 days after the date the return is filed, no interest shall be allowed under subsection (a) on such overpayment.”

1988—Subsecs. (h) to (j). Pub. L. 100–418 redesignated subsecs. (i) and (j) as (h) and (i), respectively, and struck out former subsec. (h) which related to special rule for windfall profit tax.

1986—Subsec. (a). Pub. L. 99–514 substituted “the overpayment rate established under section 6621” for “an annual rate established under section 6621”.

1984—Subsec. (f)(3)(C). Pub. L. 98–369, § 714(n)(2)(A), added subpar. (C).

Subsec. (f)(4). Pub. L. 98–369, § 211(b)(27), struck out par. (4) which provided that for purposes of subsection (a), if any overpayment of tax imposed by subtitle A arose by operation of section 815(d)(5) (relating to reduction of policyholders surplus account of life insurance companies for certain unused deductions), such overpayment would be deemed not to have been made prior to the close of the last taxable year to which the loss described in section 815(d)(5)(A) was carried under section 812(b)(2).

1982—Subsec. (b)(3). Pub. L. 97–248, § 346(a), added par. (3).

Subsec. (f)(1). Pub. L. 97–248, § 346(c)(1)(A), substituted “the filing date for the taxable year” for “the close of the taxable year”.

Subsec. (f)(2)(A). Pub. L. 97–248, § 346(c)(1)(B), substituted “the filing date for” for “the close of” wherever appearing.

Subsec. (f)(3), (4). Pub. L. 97–248, § 346(c)(1)(C), added par. (3) and redesignated former par. (3) as (4).

Subsec. (g). Pub. L. 97–248, § 346(c)(1)(D), substituted “the filing date (as defined in subsection (f)(3)) for the taxable year” for “the close of the taxable year”.

Subsecs. (i), (j). Pub. L. 97–248, § 346(b), added subsec. (i) and redesignated former subsec. (i) as (j).

1980—Subsecs. (h), (i). Pub. L. 96–223 added subsec. (h) and redesignated former subsec. (h) as (i).

1978—Subsec. (f)(2). Pub. L. 95–628, § 8(c)(3)(A), substituted in heading “Certain credit carrybacks” for “Investment credit carryback”, designated existing provision as subpar. (A), and in subpar. (A) as so designated inserted heading “In general” and extended the application of provision to credit carrybacks, previously limited to investment credit carrybacks, included other credit carrybacks, and added subpar. (B).

Subsec. (f)(4), (5). Pub. L. 95–628, § 8(c)(3)(B), struck out pars. (4) and (5) which provided for work incentive program credit carrybacks and new employee credit carrybacks, respectively.

1977—Subsec. (f)(5). Pub. L. 95–30 added par. (5).

1976—Subsec. (b). Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary”.

Subsec. (f)(4). Pub. L. 94–455, § 2107(g)(2)(D), inserted “, an investment credit carryback,” after “net operating loss carryback”.

Subsecs. (h), (i). Pub. L. 94–455, § 1904(b)(10)(A)(iv), redesignated subsec. (i) as (h). Former subsec. (h), which related to a refund within 45 days after filing claim for refund of interest equalization tax paid on securities sold to foreigners, was struck out.

1975—Subsec. (a). Pub. L. 93–625 substituted “an annual rate established under section 6621” for “the rate of 6 percent per annum”.

1973—Subsecs. (h), (i). Pub. L. 93–17 added subsec. (h) and redesignated former subsec. (h) as (i).

1971—Subsec. (f)(4). Pub. L. 92–178 added par. (4).

1969—Subsec. (f)(1). Pub. L. 91–172, § 512(e)(4)(A), (B), substituted “loss or capital loss carryback” for “loss carryback” in heading, and “net operating loss or net capital loss” for “net operating loss” wherever appearing in text.

Subsec. (f)(2). Pub. L. 91–172, § 512(e)(4)(C), substituted “loss carryback or a capital loss carryback” for “loss carryback”.

1967—Subsec. (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”.

1966—Subsec. (e). Pub. L. 89–721 inserted “or, in case the return is filed after such last date, is refunded within 45 days after the date the return is filed” after “(determined without regard to any extension of time for filing the return)” and changed heading to reflect amendment.

1964—Subsec. (f). Pub. L. 88–571 added par. (3) and inserted “or adjustment for certain unused deductions” in heading.

1962—Subsec. (f). Pub. L. 87–834 designated existing provisions as par. (1) and added par. (2).

1958—Subsec. (b)(1). Pub. L. 85–866, § 83(b), struck out “, but if the amount against which the credit is taken is an additional assessment, then to the date of the assessment of that amount” after “taken”.

Subsec. (c). Pub. L. 85–866, § 83(c), repealed subsec. (c) which defined “additional assessment”.

Subsecs. (g), (h). Pub. L. 85–866, § 42(b), added subsec. (g) and redesignated former subsec. (g) as (h).

Statutory Notes and Related Subsidiaries

Effective Date of 2010 Amendment

Amendment by Pub. L. 111–147 applicable, with respect to subsec. (e)(1) of this section, to returns due (without regard to extensions) after Mar. 18, 2010; with respect to subsec. (e)(2) of this section, to claims for credit or refund of any overpayment filed after Mar. 18, 2010 (regardless of the taxable period to which such refund relates); and with respect to subsec. (e)(3) of this section, to refunds paid after Mar. 18, 2010 (regardless of the taxable period to which such refund relates), see section 501(d) of Pub. L. 111–147, set out as an Effective Date note under section 1471 of this title.

Effective Date of 1998 Amendment

Amendment by Pub. L. 105–206 effective, except as otherwise provided, as if included in the provisions of the Taxpayer Relief Act of 1997, Pub. L. 105–34, to which such amendment relates, see section 6024 of Pub. L. 105–206, set out as a note under section 1 of this title.

Effective Date of 1997 Amendment

Amendment by Pub. L. 105–34 applicable to foreign tax credit carrybacks arising in taxable years beginning after Aug. 5, 1997, see section 1055(c) of Pub. L. 105–34, set out as a note under section 6601 of this title.

Effective Date of 1993 Amendment

Pub. L. 103–66, title XIII, § 13271(b), Aug. 10, 1993, 107 Stat. 542, provided that:

“(1) Paragraph (1) of section 6611(e) of the Internal Revenue Code of 1986 (as amended by subsection (a)) shall apply in the case of returns the due date for which (determined without regard to extensions) is on or after January 1, 1994.
“(2) Paragraph (2) of section 6611(e) of such Code (as so amended) shall apply in the case of claims for credit or refund of any overpayment filed on or after January 1, 1995, regardless of the taxable period to which such refund relates.
“(3) Paragraph (3) of section 6611(e) of such Code (as so amended) shall apply in the case of any refund paid on or after January 1, 1995, regardless of the taxable period to which such refund relates.”

Effective Date of 1988 Amendment

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

Effective Date of 1986 Amendment

Amendment by Pub. L. 99–514 applicable for purposes of determining interest for periods after Dec. 31, 1986, see section 1511(d) of Pub. L. 99–514, set out as a note under section 47 of this title.

Effective Date of 1984 Amendments

Amendment by section 211(b)(27) of Pub. L. 98–369 applicable to taxable years beginning after Dec. 31, 1983, see section 215 of Pub. L. 98–369, set out as an Effective Date note under section 801 of this title.

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

Pub. L. 99–514, title XVIII, § 1875(d)(3), Oct. 22, 1986, 100 Stat. 2896, provided that: “Notwithstanding section 715 of the Tax Reform Act of 1984 [Pub. L. 98–369], the amendments made by section 714(n)(2) of such Act [amending this section and section 6411 of this title] shall apply only to applications filed after July 18, 1984.”

Effective Date of 1982 Amendment

Pub. L. 97–248, title III, § 346(d), Sept. 3, 1982, 96 Stat. 638, provided that:

“(1) In general.— The amendments made by subsections (a) and (b) [amending this section] shall apply to returns filed after the 30th day after the date of the enactment of this Act [Sept. 3, 1982].
“(2) Subsection (c).— The amendments made by subsection (c) [amending this section and section 6601 of this title] shall apply to interest accruing after the 30th day after the date of the enactment of this Act [Sept. 3, 1982].”

Effective Date of 1980 Amendment

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

Effective Date of 1978 Amendment

Amendment by Pub. L. 95–628 applicable to carrybacks arising in taxable years beginning after Nov. 10, 1978, see section 8(d) of Pub. L. 95–628, set out as a note under section 6511 of this title.

Effective Date of 1977 Amendment

Amendment by Pub. L. 95–30 applicable to taxable years beginning after Dec. 31, 1976, and to credit carrybacks from such years, see section 202(e) of Pub. L. 95–30, set out as an Effective Date note under section 51 of this title.

Effective Date of 1975 Amendment

Amendment by Pub. L. 93–625 effective July 1, 1975, and applicable to amounts outstanding on such date or arising thereafter, see section 7(e) of Pub. L. 93–625, set out as an Effective Date note under section 6621 of this title.

Effective Date of 1971 Amendment

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

Effective Date of 1969 Amendment

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

Effective Date of 1967 Amendment

Amendment by Pub. 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 Pub. L. 90–225, set out as a note under section 46 of this title.

Effective Date of 1966 Amendment

Pub. L. 89–721, § 1(b), Nov. 2, 1966, 80 Stat. 1150, provided that: “The amendment made by subsection (a) [amending this section] shall apply with respect to refunds made more than 45 days after the date of the enactment of this Act [Nov. 2, 1966].”

Effective Date of 1964 Amendment

Amendment by Pub. 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 Pub. L. 88–571, set out as a note under section 6501 of this title.

Effective Date of 1962 Amendment

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

Effective Date of 1958 Amendment

Amendment by section 42(b) of Pub. L. 85–866 applicable only with respect to taxable years beginning after Dec. 31, 1957, see section 42(c) of Pub. L. 85–866, set out as a note under section 904 of this title.

Amendment by section 83(b), (c) of Pub. L. 85–866 applicable only in respect of overpayments credited after Dec. 31, 1957, see section 83(d) of Pub. L. 85–866, set out as a note under section 6601 of this title.

No Interest on Individual Income Tax Refunds for 1974 Refunded Within 60 Days After Return Is Filed

Pub. L. 94–12, title I, § 101(b), Mar. 29, 1975, 89 Stat. 28, as amended by Pub. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that: “In applying section 6611(e) of the Internal Revenue Code of 1986 [formerly I.R.C. 1954] (relating to income tax refund within 45 days after return is filed) in the case of any overpayment of tax imposed by subtitle A of such Code by an individual (other than an estate or trust and other than a nonresident alien individual) for a taxable year beginning in 1974, ‘60 days’ shall be substituted for ‘45 days’ each place it appears in such section 6611(e).”