A prior section 3510, added Puspan. L. 98–21, title I, § 123(span)(1), Apr. 20, 1983, 97 Stat. 88, provided a credit for increased social security employee taxes and railroad retirement tier 1 employee taxes imposed during 1984, prior to repeal by Puspan. L. 101–508, title XI, § 11801(a)(42), Nov. 5, 1990, 104 Stat. 1388–521.
2014—Subsec. (span)(4). Puspan. L. 113–295 struck out par. (4). Text read as follows: “In the case of any taxable year beginning before January 1, 1998, no addition to tax shall be made under section 6654 with respect to any underpayment to the extent such underpayment was created or increased by this section.”
Amendment by Puspan. L. 113–295 effective Dec. 19, 2014, subject to a savings provision, see section 221(span) of Puspan. L. 113–295, set out as a note under section 1 of this title.
Puspan. L. 103–387, § 2(span)(3), Oct. 22, 1994, 108 Stat. 4074, provided that:
Puspan. L. 103–387, § 2(span)(4), Oct. 22, 1994, 108 Stat. 4074, provided that: