In lieu of the tax imposed by section 1, there is hereby imposed for each taxable year on the taxable income of every individual—

In lieu of the tax imposed by section 1, there is hereby imposed for each taxable year on the taxable income of every individual—

(A) who does not itemize his deductions for the taxable year, and

(B) whose taxable income for such taxable year does not exceed the ceiling amount,

(2) Ceiling amount defined For purposes of paragraph (1), the term “ceiling amount” means, with respect to any taxpayer, the amount (not less than $20,000) determined by the Secretary for the tax rate category in which such taxpayer falls.

(3) Authority to prescribe tables for taxpayers who itemize deductions The Secretary may provide that this section shall apply also for any taxable year to individuals who itemize their deductions. Any tables prescribed under the preceding sentence shall be on the basis of taxable income.

This section shall not apply to—

(1) an individual making a return under section 443(a)(1) for a period of less than 12 months on account of a change in annual accounting period, and

(2) an estate or trust.

For purposes of this title, the tax imposed by this section shall be treated as tax imposed by section 1.

Whenever it is necessary to determine the taxable income of an individual to whom this section applies, the taxable income shall be determined under section 63.

For computation of tax by Secretary, see section 6014.

(Aug. 16, 1954, ch. 736, 68A Stat. 8; Pub. L. 88–272, title III, § 301(a), Feb. 26, 1964, 78 Stat. 129; Pub. L. 91–172, title VIII, § 803(c), Dec. 30, 1969, 83 Stat. 684; Pub. L. 94–12, title II, § 201(c), Mar. 29, 1975, 89 Stat. 29; Pub. L. 94–455, title V, § 501(a), Oct. 4, 1976, 90 Stat. 1558; Pub. L. 95–30, title I, § 101(b), May 23, 1977, 91 Stat. 131; Pub. L. 95–600, title IV, § 401(b)(1), Nov. 6, 1978, 92 Stat. 2867; Pub. L. 95–615, title II, § 202(f), as added Pub. L. 96–222, title I, § 108(a)(1)(A), Apr. 1, 1980, 94 Stat. 223; Pub. L. 96–222, title I, § 108(a)(1)(E), Apr. 1, 1980, 94 Stat. 225; Pub. L. 97–34, title I, §§ 101(b)(2)(B), (C), (c)(2)(A), 121(c)(3), Aug. 13, 1981, 95 Stat. 183, 197; Pub. L. 99–514, title I, §§ 102(b), 141(b)(1), Oct. 22, 1986, 100 Stat. 2102, 2117.)