1986—Subsec. (a). Pub. L. 99–514, § 1812(a)(1), substituted “did not reduce the amount of tax imposed by this chapter” for “did not reduce income subject to tax”.

Subsec. (c). Pub. L. 99–514, § 1812(a)(2), substituted “reducing tax imposed by this chapter” for “reducing income subject to tax or reducing tax imposed by this chapter, as the case may be”.

1984—Pub. L. 98–369 amended section generally, substituting provisions relating to recovery of tax benefit items for provisions relating to recovery of bad debts, prior taxes, and delinquency amounts.

1980—Subsec. (d). Pub. L. 96–589 added subsec. (d).

1976—Subsec. (b)(4). Pub. L. 94–455 struck out “or his delegate” after “Secretary”.

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

Pub. L. 98–369, div. A, title I, § 171(c), July 18, 1984, 98 Stat. 699, provided that: “The amendments made by this section [amending this section] shall apply to amounts recovered after December 31, 1983, in taxable years ending after such date.”

Amendment by Pub. L. 96–589 applicable to transactions which occur after Dec. 31, 1980, other than transactions which occur in a proceeding in a bankruptcy case or similar judicial proceeding or in a proceeding under Title 11 commencing on or after Dec. 31, 1980, with an exception permitting the debtor to make the amendment applicable to transactions occurring after Sept. 30, 1979, in a specified manner, see section 7(a)(1), (f) of Pub. L. 96–589, set out as a note under section 108 of this title.

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 Pub. 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 Pub. L. 99–514, as amended, set out as a note under section 401 of this title.