2015—Subsecs. (a), (c). Pub. L. 114–41 substituted “fourth month” for “third month” in concluding provisions.

1976—Subsecs. (a), (b), (d), (e), (g). Pub. L. 94–455, § 1906(b)(13)(A), struck out “or his delegate” after “Secretary”.

Subsec. (h). Pub. L. 94–455, §§ 1902(b)(2)(B), 1906(b)(13)(A), substituted “section 6503(e)” for “section 6503(f)”, and struck out “or his delegate” after “Secretary”.

1975—Subsec. (e). Pub. L. 93–625, § 7(d)(2), struck out provision that in applying section 6601(j) (relating to the application of the 4-percent interest rate in the case of recoveries of foreign expropriation losses to which this section applies) in the case of a deficiency, the entire amount which was prorated to installments under this section shall be treated as an amount of tax the payment of which was extended under this section.

Subsec. (h). Pub. L. 93–625, § 7(d)(3), struck out par. (1) providing a cross reference for payment of interest at 4 percent per annum for period of an extension under section 6601(j) of this title, and redesignated pars. (2) and (3) as (1) and (2), respectively.

Amendment by Pub. L. 114–41 applicable to returns for taxable years beginning after Dec. 31, 2015, with special rule for certain C corporations, see section 2006(a)(3) of Pub. L. 114–41, set out as a note under section 170 of this title.

Amendment by section 1902(b)(2)(B) of Pub. L. 94–455 applicable to estates of decedents dying after Oct. 4, 1976, see section 1902(c)(1) of Pub. L. 94–455, set out as a note under section 2012 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.

Section applicable with respect to amounts received after Dec. 31, 1964, in respect of foreign expropriation losses (as defined in section 1351(b) of this title) sustained after Dec. 31, 1958, see section 2 of Pub. L. 89–384, set out as a note under section 1351 of this title.