Section, added Pub. L. 87–834, § 19(e), Oct. 16, 1962, 76 Stat. 1058; amended Pub. L. 88–272, title II, §§ 204(c)(2), 221(b)(3), Feb. 26, 1964, 78 Stat. 37, 75; Pub. L. 94–455, title XIX, § 1906(b)(13)(A), Oct. 4, 1976, 90 Stat. 1834; Pub. L. 96–167, § 7(b)(2), Dec. 29, 1979, 93 Stat. 1277; Pub. L. 97–34, title VII, § 723(a)(2), (b)(2), Aug. 13, 1981, 95 Stat. 343, 344; Pub. L. 97–248, title III, §§ 309(b)(3), 311(a)(2), 312(b), 314(b), 315(c), Sept. 3, 1982, 96 Stat. 595, 600, 602, 605, 607; Pub. L. 97–448, title II, § 201(i)(3), Jan. 12, 1983, 96 Stat. 2395; Pub. L. 98–67, title I, § 105(b)(2), Aug. 5, 1983, 97 Stat. 381; Pub. L. 98–369, div. A, title I, §§ 145(b)(3), 146(b)(3), 148(b)(3), 149(b)(2), (3), 155(b)(2)(B), title VII, § 714(f), (q)(3), July 18, 1984, 98 Stat. 685, 686, 689, 690, 693, 961, 966; Pub. L. 99–514, title XVIII, § 1811(c)(1), Oct. 22, 1986, 100 Stat. 2833, related to penalties for failure to furnish certain statements.

Repeal applicable to returns the due date for which (determined without regard to extensions) is after Dec. 31, 1986, see section 1501(e) of Pub. L. 99–514, set out as an Effective Date note under section 6721 of this title.