2000—Subsec. (e)(5)(A), (B). Pub. L. 106–554 substituted “subsection (d)(5)” for “subsections (d)(5) and (l)(3)(B)”.

1999—Subsec. (e)(5). Pub. L. 106–170 added par. (5).

1997—Subsec. (g)(3). Pub. L. 105–34 inserted at end “In the case of a private foundation, subsection (c)(2) shall be applied by substituting ‘May 15’ for ‘April 15’.”

1996—Subsec. (g)(3). Pub. L. 104–188, § 1703(h), in closing provisions, substituted “, subsection (e)(2)(A) shall be applied by substituting ‘2 months’ for ‘3 months’ in clause (i)(I), the election under clause (i) of subsection (e)(2)(C) may be made separately for each installment, and clause (ii) of subsection (e)(2)(C) shall not apply.” for “, and, except in the case of an election under subsection (e)(2)(C), subsection (e)(2)(A) shall be applied by substituting ‘2 months’ for ‘3 months’ and in clause (i)(I), by substituting ‘4 months’ for ‘5 months’ in clause (i)(II), by substituting ‘7 months’ for ‘8 months’ in clause (i)(III), and by substituting ‘10 months’ for ‘11 months’ in clause (i)(IV).”

1994—Subsec. (e)(4). Pub. L. 103–465 added par. (4).

1993—Subsec. (d)(1)(B)(i). Pub. L. 103–66, § 13225(a)(1), substituted “100 percent” for “91 percent” in two places.

Subsec. (d)(2). Pub. L. 103–66, § 13225(a)(2)(A)(ii), substituted “100 percent” for “91 percent” in heading.

Subsec. (d)(3). Pub. L. 103–66, § 13225(a)(2)(A)(i), struck out heading and text of par. (3). Text read as follows: “In the case of any taxable year beginning after June 30, 1992, and before 1997—

“(A) paragraph (1)(B)(i) and subsection (e)(3)(A)(i) shall be applied by substituting ‘97 percent’ for ‘91 percent’ each place it appears, and

“(B) the table contained in subsection (e)(2)(B)(ii) shall be applied by substituting ‘24.25’, ‘48.50’, ‘72.75’, and ‘97’ for ‘22.75’, ‘45.50’, ‘68.25’, and ‘91.00’, respectively.”

Subsec. (e)(2)(A)(i)(II). Pub. L. 103–66, § 13225(b)(1)(A), struck out “or for the first 5 months” after “3 months”.

Subsec. (e)(2)(A)(i)(III). Pub. L. 103–66, § 13225(b)(1)(B), struck out “or for the first 8 months” after “6 months”.

Subsec. (e)(2)(A)(i)(IV). Pub. L. 103–66, § 13225(b)(1)(C), struck out “or for the first 11 months” after “9 months”.

Subsec. (e)(2)(B)(ii). Pub. L. 103–66, § 13225(a)(2)(B), in table, substituted applicable percentages of 25, 50, 75, and 100 for 22.75, 45.50, 68.25, and 91.00, respectively, in 1st, 2nd, 3rd, and 4th installments.

Subsec. (e)(2)(C). Pub. L. 103–66, § 13225(b)(2), added subpar. (C).

Subsec. (e)(3)(A)(i). Pub. L. 103–66, § 13225(a)(2)(C), substituted “100 percent” for “91 percent”.

Subsec. (g)(3). Pub. L. 103–66, § 13225(b)(3), substituted “and, except in the case of an election under subsection (e)(2)(C), subsection (e)(2)(A)” for “and subsection (e)(2)(A)” in last sentence.

1992—Subsec. (d)(1)(B)(i). Pub. L. 102–318, § 512(a)(1), substituted “91 percent” for “90 percent” in two places.

Subsec. (d)(2). Pub. L. 102–318, § 512(a)(2), substituted “91 percent” for “90 percent” in heading.

Subsec. (d)(3). Pub. L. 102–318, § 512(a)(3), added par. (3) and struck out former par. (3) which related to temporary increase in amount of installment method based on current tax year for taxable years beginning after 1991 and before 1997.

Subsec. (d)(3)(A). Pub. L. 102–244, amended table generally, substituting a single entry “1993 through 1996 . . . . . 95” for former arrangement under which years after 1992 were covered by two table entries: “1993 or 1994 . . . . . 94” and “1995 or 1996 . . . . . 95”.

Subsec. (e)(2)(B)(ii). Pub. L. 102–318, § 512(b)(1), in table, substituted applicable percentages of 22.75, 45.50, 68.25, and 91.00 for 22.5, 45, 67.5, and 90, respectively, in 1st, 2nd, 3rd and 4th installments.

Subsec. (e)(3)(A)(i). Pub. L. 102–318, § 512(b)(2), substituted “91 percent” for “90 percent”.

1991—Subsec. (d)(3). Pub. L. 102–227, § 201(a), added par. (3).

Subsec. (e)(1). Pub. L. 102–227, § 201(b), substituted “paragraphs (2) and (3) of subsection (d)” for “subsection (d)(2)”.

1990—Subsec. (g)(3). Pub. L. 101–508 inserted a period at end of last sentence.

1989—Subsec. (e)(1). Pub. L. 101–239, § 7822(a), substituted “under subsection (d)(1)” for “under section (d)(1)”.

Subsec. (g)(4). Pub. L. 101–239, § 7209(a), added par. (4).

1988—Subsec. (e)(1). Pub. L. 100–647, § 5001(a), struck out at end “A reduction shall be treated as recaptured for purposes of subparagraph (B) if 90 percent of the reduction is recaptured.”

Subsec. (g)(1)(B). Pub. L. 100–418 amended subpar. (B) generally. Prior to amendment, subpar. (B) read as follows: “the sum of—

“(i) the credits against tax provided by part IV of subchapter A of chapter 1, plus

“(ii) to the extent allowed under regulations prescribed by the Secretary, any overpayment of the tax imposed by section 4986 (determined without regard to section 4995 (a)(4)(B)).”

Subsec. (g)(3). Pub. L. 100–647, § 2004(r), inserted last sentence, and struck out former last sentence which read as follows: “In the case of any organization described in subparagraph (A), subsection (b)(2)(A) shall be applied by substituting ‘5th month’ for ‘3rd month’.”

1987—Pub. L. 100–203 amended section generally, revising and restating as subsecs. (a) to (j) provisions of former subsecs. (a) to (i).

1986—Subsec. (a)(1). Pub. L. 99–514, § 1511(c)(15), substituted “the underpayment rate established under section 6621” for “the rate established under section 6621”.

Subsec. (f)(1). Pub. L. 99–514, § 701(d)(3), amended par. (1) generally, restating existing provisions in subpar. (A) and adding subpar. (B).

Pub. L. 99–499 amended subsec. (f)(1), as amended by the Tax Reform Act of 1986 (Pub. L. 99–514), by striking out “plus” at end of subpar. (A), substituting “plus” for “over” at end of subpar. (B), and adding subpar. (C).

1983—Subsec. (f)(2)(B). Pub. L. 97–448 amended subpar. (B) generally. Prior to amendment, subpar. (B) read as follows: “to the extent allowed under regulations prescribed by the Secretary, any amount which is treated under section 6429 as an overpayment of the tax imposed by section 4986”. Notwithstanding directory language that amendment be made to subsec. (e)(2)(B), the amendment was executed to subsec. (f)(2)(B) to reflect the probable intent of Congress, the intervening redesignation of subsec. (e) as (f) by Pub. L. 97–248, and the retrospective effect of the amendment as provided by section 203(a), (b) of Pub. L. 97–448, set out as an Effective Date of 1983 Amendment note under section 4988 of this title.

1982—Subsec. (a). Pub. L. 97–248, § 234(c), in heading substituted “Addition to tax” for “Addition to the tax”, in provisions preceding par. (1) inserted reference to subsec. (e) as an exception and struck out “estimated” before “tax”, designated existing provisions as par. (1), and in par. (1) as so designated struck out parenthetical reference to subsecs. (b) and (c) for determination of the amount of the underpayment and the period of the underpayment, respectively, and added par. (2).

Subsec. (b)(1). Pub. L. 97–248, § 234(a)(1), substituted “90” for “80” wherever appearing.

Subsec. (d)(3)(A). Pub. L. 97–248, § 234(a)(2), substituted “90” for “80”.

Subsec. (e). Pub. L. 97–248, § 234(d)(1), added subsec. (e). Former subsec. (e) redesignated (f).

Subsec. (f). Pub. L. 97–248, § 234(d), redesignated former subsec. (e) as (f) and substituted references to subsecs. (e) and (i) for references to subsec. (h). Former subsec. (f) redesignated (g).

Subsecs. (g) to (i). Pub. L. 97–248, § 234(d)(1), redesignated former subsecs. (f) to (h) as (g) to (i), respectively.

1981—Subsec. (e)(2). Pub. L. 97–34, § 601(a)(6)(B), inserted “the sum of—”, designated existing provisions as subpar. (A), inserted at end of subpar. (A) “, plus”, and added subpar. (B).

Subsec. (h). Pub. L. 97–34, § 731(a), (b), substituted in heading “minimum percentage” for “at least 60 percent” and provisions of par. (1) respecting minimum percentage, for provisions respecting in the case of a large corporation, the amount treated as the estimated tax for the taxable year under paragraphs (1) and (2) of subsection (d) shall in no event be less than 60 percent of the tax shown on the return for the taxable year, or if no return was filed, the tax for such year.

1980—Subsec. (e). Pub. L. 96–499, § 1111(b), substituted “subsections (b), (d), and (h)” for “subsections (b) and (d)”.

Subsec. (h). Pub. L. 96–499, § 1111(a), added subsec. (h).

1978—Subsec. (e). Pub. L. 95–600 struck out provisions relating to the corporation’s temporary estimated tax exemption.

1976—Subsec. (e)(1)(B). Pub. L. 94–455, § 1906(b)(3)(A), struck out in cl. (ii) “after December 31, 1967, and” after “taxable year beginning” and struck out cl. (iii) which related to the case of a taxable year beginning after Dec. 31, 1967, and before Jan. 1, 1972, the amount of the corporation’s transitional exemption for such year.

Subsec. (e)(2)(B). Pub. L. 94–455, § 1906(b)(3)(B), substituted “clause (ii)” for “clauses (ii) and (iii)”.

Subsec. (e)(3), (4). Pub. L. 94–455, § 1906(b)(3)(C)(i), redesignated par. (4) as (3). Former par. (3), which related to the computation of a corporation’s transitional exemption, was struck out.

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

1975—Subsecs. (a), (g)(1). Pub. L. 93–625 substituted “an annual rate established under section 6621” for “the rate of 6 percent per annum”.

1968—Subsec. (b)(1). Pub. L. 90–364, § 103(c)(1), substituted “80 percent” for “70 percent”.

Subsec. (d)(1). Pub. L. 90–364, § 103(e)(1), struck out “reduced by $100,000” after “The tax shown on the return of the corporation for the preceding taxable year”.

Subsec. (d)(3)(A). Pub. L. 90–364, § 103(c)(1), substituted “80 percent” for “70 percent”.

Subsec. (e). Pub. L. 90–364, § 103(c)(2), designated existing provisions as par. (1) under a heading “In general”, in such redesignated par. (1) substituted “For purposes of subsections (b) and (d)” for “For purposes of subsections (b), (d)(2), and (d)(3)” in introductory text, redesignated as subpar. (A) former par. (1) and as subpar. (B) former par. (2), struck out reference to $100,000 as one factor in the sum required for redesignated subpar. (B) and added cls. (ii) and (iii), and added pars. (2), (3), and (4) under headings “Temporary estimated tax exemption”, “Transitional exemption”, and “Special rule for subsection (d)(1) and (2)” respectively.

Subsec. (g). Pub. L. 90–364, § 103(d)(2), added subsec. (g).

1964—Subsec. (c)(2). Pub. L. 88–272, § 122(c)(1), substituted “any installment date” and “such installment date” for “the 15th day of the 12th month”.

Subsec. (d)(3). Pub. L. 88–272, § 122(c)(2), redesignated cls. (A)(i) and (ii) as (A)(iii) and (iv), respectively, added cls. (A)(i) and (ii), and substituted “(3, 5, 6, 8, 9,)” for “(6 or 8, or 9)” in subpar. (B)(ii).

Pub. L. 106–170, title V, § 571(b), Dec. 17, 1999, 113 Stat. 1951, provided that: “The amendment made by subsection (a) [amending this section] shall apply to estimated tax payments due on or after December 15, 1999.”

Section 1461(b) of Pub. L. 105–34 provided that: “The amendment made by subsection (a) [amending this section] shall apply for purposes of determining underpayments of estimated tax for taxable years beginning after the date of the enactment of this Act [Aug. 5, 1997].”

Amendment by Pub. L. 104–188 effective as if included in the provision of the Revenue Reconciliation Act of 1993, Pub. L. 103–66, §§ 13001–13444, to which such amendment relates, see section 1703(o) of Pub. L. 104–188, set out as a note under section 39 of this title.

Amendment by Pub. L. 103–465 applicable for purposes of determining underpayments of estimated tax for taxable years beginning after Dec. 31, 1994, see section 711(c) of Pub. L. 103–465, set out as a note under section 6654 of this title.

Section 13225(c) of Pub. L. 103–66 provided that: “The amendments made by this section [amending this section] shall apply to taxable years beginning after December 31, 1993.”

Section 512(c) of Pub. L. 102–318 provided that: “The amendments made by this section [amending this section] shall apply to taxable years beginning after June 30, 1992.”

Section 3(b) of Pub. L. 102–244 provided that: “The amendment made by subsection (a) [amending this section] shall apply to taxable years beginning after December 31, 1992.”

Section 201(c) of Pub. L. 102–227 provided that: “The amendments made by subsection (a) [amending this section] shall apply to taxable years beginning after December 31, 1991.”

Section 7209(b) of Pub. L. 101–239 provided that: “The amendment made by subsection (a) [amending this section] shall apply to taxable years beginning after December 31, 1989.”

Amendment by section 7822(a) of Pub. L. 101–239 effective as if included in the provision of the Revenue Act of 1987, Pub. L. 100–203, title X, to which such amendment relates, see section 7823 of Pub. L. 101–239, set out as a note under section 26 of this title.

Amendment by section 2004(r) of Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Revenue Act of 1987, Pub. L. 100–203, title X, to which such amendment relates, see section 2004(u) of Pub. L. 100–647, set out as a note under section 56 of this title.

Section 5001(b) of Pub. L. 100–647 provided that: “The amendment made by subsection (a) [amending this section] shall apply to installments required to be made after December 31, 1988.”

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.

Amendment by Pub. L. 100–203 applicable to taxable years beginning after Dec. 31, 1987, see section 10301(c) of Pub. L. 100–203, set out as a note under section 585 of this title.

Amendment by section 701(d)(3) of Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 701(f) of Pub. L. 99–514, set out as an Effective Date note under section 55 of this title.

Amendment by section 1511(c)(15) of 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.

Amendment by Pub. L. 99–499 applicable to taxable years beginning after Dec. 31, 1986, see section 516(c) of Pub. L. 99–499, set out as a note under section 26 of this title.

Amendment by Pub. L. 97–448 effective, except as otherwise provided, as if it had been included in the provision of the Crude Oil Windfall Profit Tax Act of 1980, Pub. L. 96–223, to which such amendment relates, see section 203(a), (b) of Pub. L. 97–448, set out as a note under section 6652 of this title.

Section 234(e) of Pub. L. 97–248 provided that: “The amendments made by this section [amending this section and sections 832, 6081, 6152, and 6164 of this title] shall apply to taxable years beginning after December 31, 1982.”

Amendment by section 601(a)(6)(B) of Pub. L. 97–34 effective Jan. 1, 1980, see section 601(c)(2) of Pub. L. 97–34, set out as a note under section 6654 of this title.

Section 731(c) of Pub. L. 97–34 provided that: “The amendments made by this section [amending this section] shall apply to taxable years beginning after December 31, 1981.”

Section 1111(c) of Pub. L. 96–499 provided that: “The amendments made by this section [amending this section] shall apply to taxable years beginning after December 31, 1980.”

Amendment by Pub. L. 95–600 applicable to taxable years beginning after Dec. 31, 1978, see section 301(c) of Pub. L. 95–600, set out as a note under section 11 of this title.

Amendment by section 1906 (b)(3)(A)–(C)(i) of Pub. L. 94–455 effective with respect to taxable years after Dec. 31, 1976, see section 1906(d)(2) of Pub. L. 94–455, set out as a note under section 6013 of this title.

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.

Amendment by Pub. L. 90–364 applicable with respect to taxable years beginning after Dec. 31, 1967, except as provided by section 104 of Pub. L. 90–364, see section 103(f) of Pub. L. 90–364, set out as a note under section 243 of this title.

Amendment by Pub. L. 88–272 effective, except for purposes of section 21 of this title, with respect to taxable years beginning after Dec. 31, 1963, see section 131 of Pub. L. 88–272, set out as a note under section 1 of this title.

Pub. L. 109–222, title IV, § 401, May 17, 2006, 120 Stat. 353, as amended by Pub. L. 110–28, title VIII, § 8248, May 25, 2007, 121 Stat. 204; Pub. L. 110–42, § 4, June 30, 2007, 121 Stat. 236; Pub. L. 110–52, § 3, Aug. 1, 2007, 121 Stat. 264; Pub. L. 110–89, § 2(a), Sept. 28, 2007, 121 Stat. 982; Pub. L. 110–138, title VI, § 602, Dec. 14, 2007, 121 Stat. 1490, provided that: “Notwithstanding section 6655 of the Internal Revenue Code of 1986—

“(1) in the case of a corporation with assets of not less than $1,000,000,000 (determined as of the end of the preceding taxable year)—

“(A) the amount of any required installment of corporate estimated tax which is otherwise due in July, August, or September of 2006 shall be 105 percent of such amount,

“(B) the amount of any required installment of corporate estimated tax which is otherwise due in July, August, or September of 2012 shall be 115 percent percent of such amount,

“(C) the amount of any required installment of corporate estimated tax which is otherwise due in July, August, or September of 2013 shall be 100.75 percent of such amount, and

“(D) the amount of the next required installment after an installment referred to in subparagraph (A), (B), or (C) shall be appropriately reduced to reflect the amount of the increase by reason of such subparagraph,

“(2) 20.5 percent of the amount of any required installment of corporate estimated tax which is otherwise due in September 2010 shall not be due until October 1, 2010, and

“(3) 27.5 percent of the amount of any required installment of corporate estimated tax which is otherwise due in September 2011 shall not be due until October 1, 2011.”

[Pub. L. 110–142, § 10, Dec. 20, 2007, 121 Stat. 1808, provided that: “The percentage under subparagraph (B) of section 401(1) of the Tax Increase Prevention and Reconciliation Act of 2005 [Pub. L. 109–222, set out above] in effect on the date of the enactment of this Act [Dec. 20, 2007] is increased by 1.50 percentage points.”]

[Pub. L. 110–138, title I, § 107(a), (c), title VI, § 602, Dec. 14, 2007, 121 Stat. 1459, 1490, provided that, effective on the date on which the United States-Peru Trade Promotion Agreement enters into force and ceasing to have effect on the date on which the Agreement terminates, section 401(1)(B) of Pub. L. 109–222, set out above, is amended by striking “115 percent” and inserting “115.75 percent”. See section 107(a), (c) of Pub. L. 110–138, set out in a note under section 3805 of Title 19, Customs Duties.]

Pub. L. 107–16, title VIII, § 801, June 7, 2001, 115 Stat. 148, provided that: “Notwithstanding section 6655 of the Internal Revenue Code of 1986—

“(1) 100 percent of the amount of any required installment of corporate estimated tax which is otherwise due in September 2001 shall not be due until October 1, 2001; and

“(2) 20 percent of the amount of any required installment of corporate estimated tax which is otherwise due in September 2004 shall not be due until October 1, 2004.”

No addition to tax to be made under this section with respect to any underpayment of an installment required to be paid on or before the 30th day after July 22, 1998, to the extent such underpayment was created or increased by any provision of Pub. L. 105–206, see section 1(c) of Pub. L. 105–206, set out as a note under section 6654 of this title.

No addition to tax to be made under this section for any period before Jan. 1, 1998, for any payment the due date of which is before Jan. 16, 1998, with respect to any underpayment attributable to such period to the extent such underpayment was created or increased by any provision of Pub. L. 105–34, see section 1(d) of Pub. L. 105–34, set out as a note under section 6654 of this title.

No addition to tax to be made under this section with respect to any underpayment of an installment required to be paid before Aug. 20, 1996, to the extent such underpayment was created or increased by any provision of title I (§§ 1101–1954) of Pub. L. 104–188, see section 1102 of Pub. L. 104–188, set out as a note under section 6654 of this title.

No addition to tax to be made under this section for any period before Apr. 16, 1994 (Mar. 16, 1994, in the case of a corporation), with respect to any underpayment to the extent such underpayment was created or increased by any provision of chapter 1 (§§ 13001–13444) of title XIII of Pub. L. 103–66, see section 13001(d) of Pub. L. 103–66, set out as a note under section 6654 of this title.

No addition to tax to be made under this section for taxable year preceding taxpayer’s first taxable year beginning after Dec. 31, 1990, with respect to any underpayment to the extent such underpayment was created or increased by reason of section 420 (b)(4)(B) of this title, see section 12011(c)(2) of Pub. L. 101–508, set out as an Effective Date note under section 420 of this title.

Section 11307 of Pub. L. 101–508 provided that: “No addition to tax shall be made under section 6655 of the Internal Revenue Code of 1986 for any period before March 16, 1991, with respect to any underpayment to the extent such underpayment was created or increased by any provision of this part [part I (§§ 11301–11307) of subtitle C of title XI of Pub. L. 101–508, see Tables for classification].”

For applicability of amendment by section 701(d)(3) of Pub. L. 99–514 notwithstanding any treaty obligation of the United States in effect on Oct. 22, 1986, see section 1012(aa)(2) of Pub. L. 100–647, set out as a note under section 861 of this title.

No addition to tax to be made under this section for any period before Mar. 16, 1989, with respect to any underpayment to the extent such underpayment was created or increased by any provision of title I (§§ 1001 to 1019) or II (§§ 2001 to 2006) of Pub. L. 100–647, see section 1019(b) of Pub. L. 100–647, set out as an Effective Date of 1988 Amendment note under section 1 of this title.

Section 10303(b)(2) of Pub. L. 100–203 provided that:

“(A) In general.—In the case of a large corporation, no addition to tax shall be imposed by section 6655 of the Internal Revenue Code of 1986 with respect to any underpayment of an estimated tax installment to which this subsection applies if no addition would be imposed with respect to such underpayment by reason of section 6655(d)(1) of such Code if such corporation were not a large corporation. The preceding sentence shall apply only to the extent the underpayment is paid on or before the last date prescribed for payment of the most recent installment of estimated tax due on or before September 15, 1987.

“(B) Installment to which subsection applies.—This subsection applies to any installment of estimated tax for a taxable year beginning after December 31, 1986, which is due on or before June 15, 1987.

“(C) Large corporation.—For purposes of this subsection, the term ‘large corporation’ has the meaning given such term by section 6655(i)(2) of such Code (as in effect on the day before the date of the enactment of this Act [Dec. 22, 1987]).”

No addition to tax to be made under this section for any period before Mar. 16, 1987, with respect to any underpayment, to the extent such underpayment was created or increased by any provision of Pub. L. 99–514, see section 1543 of Pub. L. 99–514, set out as a note under section 6654 of this title.

Section 1879(a) of Pub. L. 99–514 provided that: “No addition to tax shall be made under section 6654 or 6655 of the Internal Revenue Code of 1954 [now 1986] (relating to failure to pay estimated income tax) for any period before April 16, 1985 (March 16, 1985 in the case of a taxpayer subject to section 6655 of such Code), with respect to any underpayment, to the extent that such underpayment was created or increased by any provision of the Tax Reform Act of 1984 [Pub. L. 98–369, div. A].”

Pub. L. 98–369, div. A, title II, subtitle A, § 218, July 18, 1984, 98 Stat. 766, which provided that no addition to the tax shall be made under section 6655 of this title with respect to any underpayment of an installment required to be paid before July 18, 1984, to the extent such underpayment was created or increased by any provision of this subtitle, and such underpayment was paid in full on or before the last date prescribed for payment of the first installment of estimated tax required to be paid after July 18, 1984, was repealed by Pub. L. 99–514, title XVIII, § 1824, Oct. 22, 1986, 100 Stat. 2846.

Section 803(g) of Pub. L. 94–455, as amended by Pub. L. 99–514, § 2, Oct. 22, 1986, 100 Stat. 2095, provided that: “If—

“(1) a corporation made underpayments of estimated tax for a taxable year of the corporation which includes August 1, 1975, because the corporation intended to elect to have the provisions of subparagraph (B) of section 46(a)(1) of the Internal Revenue Code of 1986 [formerly I.R.C. 1954] (as it existed before the date of enactment of this Act [Oct. 4, 1976]) apply for such taxable year, and

“(2) the corporation does not elect to have the provisions of such subparagraph apply for such taxable year because this Act does not contain the amendments made by section 804 (a)(2) (relating to flowthrough of investment credit), or the provisions of subsection (f) of such section (relating to grace period for certain plan transfers), of the bill H.R. 10612 (94th Congress, 2d Session), as amended by the Senate,

With respect to taxable years beginning before Dec. 30, 1969, if a taxpayer is required to make a declaration, or to pay any amount of estimated tax by reason of amendments made by Pub. L. 91–172, such amount shall be paid ratably on each of the remaining installment dates for the taxable year beginning with the first installment date on or after Dec. 30, 1969; as to any declaration or payment of estimated tax before the first installment date, this section, and sections 6015, 6154, and 6654 of this title shall be applied without regard to amendments made by Pub. L. 91–172, see section 946(b) of Pub. L. 91–172, set out as a note under section 6153 of this title.

Requirement of making a declaration or amended declaration of estimated tax or of payment of any amount or additional amount of estimated tax by reason of amendment of sections 51 (a)(1)(A), (B), (2)(A) and 963 (b) of this title as calling for payment of such amount or additional amount ratably on or before each of remaining installment dates for taxable year beginning with installment date on or after the 30th day after Aug. 7, 1969; application of this section without regard to such amendment with respect to any declaration or payment of estimated tax before such first installment date; and definition of “installment date”, see Pub. L. 93–53, § 5(c), Aug. 7, 1969, 83 Stat. 95.

Pub. L. 86–69, June 25, 1959, § 3(h), 73 Stat. 140, provided that in the case of a taxpayer subject to tax under section 811 of this title, as in effect before June 25, 1959, no additional tax was to be payable under this section with respect to estimated tax for a taxable year beginning in 1958.