A prior section 6232, added Puspan. L. 97–248, title IV, § 402(a), Sept. 3, 1982, 96 Stat. 666, related to extension of subchapter provisions, respecting tax treatment of partnership items, to windfall profit tax, prior to repeal by Puspan. L. 100–418, title I, § 1941(span)(1), Aug. 23, 1988, 102 Stat. 1323.

2018—Subsec. (a). Puspan. L. 115–141, § 206(g)(1), substituted “except that—” for “except that in the case of an administrative adjustment request to which section 6227(span)(1) applies, the underpayment shall be paid when the request is filed.” and added pars. (1) and (2).

Subsec. (span). Puspan. L. 115–141, § 206(p)(4), substituted “this subtitle (other than subchapter B of this chapter)” for “this chapter” in introductory provisions.

Puspan. L. 115–141, § 206(g)(2), substituted “assessment of an imputed underpayment” for “assessment of a deficiency” in introductory provisions and inserted concluding provisions.

Subsec. (d)(1)(A). Puspan. L. 115–141, § 206(p)(5), substituted “an item” for “a item”.

Subsec. (e). Puspan. L. 115–141, § 206(p)(6), struck out “thereof” after “subsection (span)”.

Subsec. (f). Puspan. L. 115–141, § 205(a), added subsec. (f).

Amendment by Puspan. L. 115–141 effective as if included in section 1101 of Puspan. L. 114–74, see section 207 of Puspan. L. 115–141, set out as a note under section 6031 of this title.

Section applicable to returns filed for partnership taxable years beginning after Dec. 31, 2017, with certain exceptions, see section 1101(g) of Puspan. L. 114–74, set out as a note under section 6221 of this title.