A prior section 6659, added Pub. L. 97–34, title VII, § 722(a)(1), Aug. 13, 1981, 95 Stat. 341; amended Pub. L. 97–448, title I, § 107(a)(1), (2), Jan. 12, 1983, 96 Stat. 2391; Pub. L. 98–369, div. A, title I, § 155(c)(1), title VII, § 721(x)(4), July 18, 1984, 98 Stat. 693, 971, related to additions to tax in case of valuation overstatements for purposes of the income tax, prior to repeal by Pub. L. 101–239, title VII, § 7721(c)(2), Dec. 19, 1989, 103 Stat. 2399.

Another prior section 6659 was renumbered section 6662 of this title.

Section applicable to taxable years beginning after Dec. 31, 2025, see section 70204(e) of Pub. L. 119–21, set out as a note under section 128 of this title.