dreamproit/uscode huggingface dataset:
26 U.S.C. § 891 (INTERNAL REVENUE CODE)
§ 891. Doubling of rates of tax on citizens and corporations of certain foreign countries
Whenever the President finds that, under the laws of any foreign country, citizens or corporations of the United States are being subjected to discriminatory or extraterritorial taxes, the President shall so proclaim and the rates of tax imposed by sections 1, 3, 11, 801, 831, 852, 871, and 881 shall, for the taxable year during which such proclamation is made and for each taxable year thereafter, be doubled in the case of each citizen and corporation of such foreign country; but the tax at such doubled rate shall be considered as imposed by such sections as the case may be. In no case shall this section operate to increase the taxes imposed by such sections (computed without regard to this section) to an amount in excess of 80 percent of the taxable income of the taxpayer (computed without regard to the deductions allowable under section 151 and under part VIII of subchapter B). Whenever the President finds that the laws of any foreign country with respect to which the President has made a proclamation under the preceding provisions of this section have been modified so that discriminatory and extraterritorial taxes applicable to citizens and corporations of the United States have been removed, he shall so proclaim, and the provisions of this section providing for doubled rates of tax shall not apply to any citizen or corporation of such foreign country with respect to any taxable year beginning after such proclamation is made.
(Aug. 16, 1954, ch. 736, 68A Stat. 283; Mar. 13, 1956, ch. 83, § 5(6), 70 Stat. 49; Pub. L. 86–69, § 3(f)(1), June 25, 1959, 73 Stat. 140; Pub. L. 98–369, div. A, title II, § 211(b)(12), July 18, 1984, 98 Stat. 755; Pub. L. 99–514, title X, § 1024(c)(13), Oct. 22, 1986, 100 Stat. 2408.)
heading: Editorial Notes
heading: Amendments
text: 1986—Pub. L. 99–514 struck out reference to section 821.
1984—Pub. L. 98–369 substituted “801” for “802”.
1959—Pub. L. 86–69 struck out reference to section 811.
1956—Act Mar. 13, 1956, inserted reference to section 811.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 1986 Amendment
text: Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, see section 1024(e) of Pub. L. 99–514, set out as a note under section 831 of this title.
heading: Effective Date of 1984 Amendment
text: Amendment by Pub. L. 98–369 applicable to taxable years beginning after Dec. 31, 1983, see section 215 of Pub. L. 98–369, set out as an Effective Date note under section 801 of this title.
heading: Effective Date of 1959 Amendment
text: Amendment by Pub. L. 86–69 applicable only with respect to taxable years beginning after Dec. 31, 1957, see section 4 of Pub. L. 86–69, set out an Effective Date note under section 381 of this title.
heading: Effective Date of 1956 Amendment
text: Amendment by act Mar. 13, 1956, applicable only to taxable years beginning after Dec. 31, 1954, see section 6 of act Mar. 13, 1956, set out as a note under section 316 of this title.
26 U.S.C. § 893 (INTERNAL REVENUE CODE)
§ 893. Compensation of employees of foreign governments or international organizations
(a) Rule for exclusion
Wages, fees, or salary of any employee of a foreign government or of an international organization (including a consular or other officer, or a nondiplomatic representative), received as compensation for official services to such government or international organization shall not be included in gross income and shall be exempt from taxation under this subtitle if—
(1) such employee is not a citizen of the United States, or is a citizen of the Republic of the Philippines (whether or not a citizen of the United States); and
(2) in the case of an employee of a foreign government, the services are of a character similar to those performed by employees of the Government of the United States in foreign countries; and
(3) in the case of an employee of a foreign government, the foreign government grants an equivalent exemption to employees of the Government of the United States performing similar services in such foreign country.
(b) Certificate by Secretary of State
The Secretary of State shall certify to the Secretary of the Treasury the names of the foreign countries which grant an equivalent exemption to the employees of the Government of the United States performing services in such foreign countries, and the character of the services performed by employees of the Government of the United States in foreign countries.
(c) Limitation on exclusion
Subsection (a) shall not apply to—
(1) any employee of a controlled commercial entity (as defined in section 892(a)(2)(B)), or
(2) any employee of a foreign government whose services are primarily in connection with a commercial activity (whether within or outside the United States) of the foreign government.
(Aug. 16, 1954, ch. 736, 68A Stat. 284; Pub. L. 100–647, title I, § 1012(t)(4), Nov. 10, 1988, 102 Stat. 3527.)
heading: Editorial Notes
heading: Amendments
text: 1988—Subsec. (c). Pub. L. 100–647 added subsec. (c).
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 1988 Amendment
text: Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 1019(a) of Pub. L. 100–647, set out as a note under section 1 of this title.
26 U.S.C. § 895 (INTERNAL REVENUE CODE)
§ 895. Income derived by a foreign central bank of issue from obligations of the United States or from bank deposits
Income derived by a foreign central bank of issue from obligations of the United States or of any agency or instrumentality thereof (including beneficial interests, participations, and other instruments issued under section 302(c) of the Federal National Mortgage Association Charter Act (12 U.S.C. 1717)) which are owned by such foreign central bank of issue, or derived from interest on deposits with persons carrying on the banking business, shall not be included in gross income and shall be exempt from taxation under this subtitle unless such obligations or deposits are held for, or used in connection with, the conduct of commercial banking functions or other commercial activities. For purposes of the preceding sentence the Bank for International Settlements shall be treated as a foreign central bank of issue.
(Added Pub. L. 87–29, § 1(a), May 4, 1961, 75 Stat. 64; amended Pub. L. 89–809, title I, § 102(a)(4)(A), Nov. 13, 1966, 80 Stat. 1543.)
heading: Editorial Notes
heading: Amendments
text: 1966—Pub. L. 89–809 exempted income derived from obligations of agencies or instrumentalities of the United States and income derived from interest on deposits with persons carrying on the banking business, inserted “(including beneficial interests, participations, and other instruments issued under section 302(c) of the Federal National Mortgage Association Charter Act (12 U.S.C. 1717)),” and inserted sentence requiring the Bank for International Settlements to be treated as a foreign central bank of issue.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 1966 Amendment
text: Amendment by Pub. L. 89–809 applicable with respect to taxable years beginning after Dec. 31, 1966, except that in applying section 864(c)(4)(B)(iii) of this title with respect to a binding contract entered into on or before Feb. 24, 1966, activities in the United States on or before such date in negotiating or carrying out such contract shall not be taken into account, see section 102(e)(1) of Pub. L. 89–809, set out as a note under section 861 of this title.
heading: Effective Date
text: Pub. L. 87–29, § 1(c), May 4, 1961, 75 Stat. 64, provided that: “The amendments made by subsections (a) and (b) [enacting this section and amending analysis preceding section 891 of this title] shall be effective with respect to income received in taxable years beginning after December 31, 1960.”
26 U.S.C. § 902 (INTERNAL REVENUE CODE)
[§ 902. Repealed. Pub. L. 115–97, title I, § 14301(a), Dec. 22, 2017, 131 Stat. 2221]
text: Section, act Aug. 16, 1954, ch. 736, 68A Stat. 286; Pub. L. 86–780, § 6(b)(2), Sept. 14, 1960, 74 Stat. 1016; Pub. L. 87–834, § 9(a), Oct. 16, 1962, 76 Stat. 999; Pub. L. 91–684, §§ 1, 2, Jan. 12, 1971, 84 Stat. 2068, 2069; Pub. L. 94–12, title VI, § 602(c)(6), Mar. 29, 1975, 89 Stat. 59; Pub. L. 94–455, title X, § 1033(a), Oct. 4, 1976, 90 Stat. 1626; Pub. L. 99–514, title XII, § 1202(a), Oct. 22, 1986, 100 Stat. 2528; Pub. L. 100–647, title I, § 1012(b)(1), (2), Nov. 10, 1988, 102 Stat. 3496; Pub. L. 105–34, title XI, §§ 1113(a), 1163(a), Aug. 5, 1997, 111 Stat. 970, 987; Pub. L. 108–357, title IV, § 405(a), Oct. 22, 2004, 118 Stat. 1498, related to deemed paid credit where domestic corporation owns 10 percent or more of voting stock of foreign corporation.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of Repeal
text: Repeal applicable to taxable years of foreign corporations beginning after Dec. 31, 2017, and to taxable years of United States shareholders in which or with which such taxable years of foreign corporations end, see section 14301(d) of Pub. L. 115–97, set out as an Effective Date of 2017 Amendment note under section 78 of this title.
26 U.S.C. § 903 (INTERNAL REVENUE CODE)
§ 903. Credit for taxes in lieu of income, etc., taxes
For purposes of this part and of sections 164(a) and 275(a), the term “income, war profits, and excess profits taxes” shall include a tax paid in lieu of a tax on income, war profits, or excess profits otherwise generally imposed by any foreign country or by any possession of the United States.
(Aug. 16, 1954, ch. 736, 68A Stat. 287; Pub. L. 88–272, title II, § 207(b)(8), Feb. 26, 1964, 78 Stat. 42; Pub. L. 100–647, title I, § 1012(v)(9), Nov. 10, 1988, 102 Stat. 3530; Pub. L. 106–519, § 4(4), Nov. 15, 2000, 114 Stat. 2433; Pub. L. 108–357, title I, § 101(b)(7), Oct. 22, 2004, 118 Stat. 1423.)
heading: Editorial Notes
heading: Amendments
text: 2004—Pub. L. 108–357 substituted “164(a)” for “114, 164(a),”.
2000—Pub. L. 106–519 substituted “114, 164(a),” for “164(a)”.
1988—Pub. L. 100–647 substituted “this part” for “this subpart”.
1964—Pub. L. 88–272 substituted “sections 164(a) and 275(a)” for “section 164(b)”.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 2004 Amendment
text: Amendment by Pub. L. 108–357 applicable to transactions after Dec. 31, 2004, see section 101(c) of Pub. L. 108–357, set out as a note under section 56 of this title.
heading: Effective Date of 2000 Amendment
text: Amendment by Pub. L. 106–519 applicable to transactions after Sept. 30, 2000, with special rules relating to existing foreign sales corporations, see section 5 of Pub. L. 106–519, set out as a note under section 56 of this title.
heading: Effective Date of 1988 Amendment
text: Amendment by Pub. L. 100–647 effective, except as otherwise provided, as if included in the provision of the Tax Reform Act of 1986, Pub. L. 99–514, to which such amendment relates, see section 1019(a) of Pub. L. 100–647, set out as a note under section 1 of this title.
heading: Effective Date of 1964 Amendment
text: Amendment by Pub. L. 88–272 applicable to taxable years beginning after Dec. 31, 1963, see section 207(c) of Pub. L. 88–272, set out as a note under section 164 of this title.
26 U.S.C. § 908 (INTERNAL REVENUE CODE)
§ 908. Reduction of credit for participation in or cooperation with an international boycott
(a) In general
If a person, or a member of a controlled group (within the meaning of section 993(a)(3)) which includes such person, participates in or cooperates with an international boycott during the taxable year (within the meaning of section 999(b)), the amount of the credit allowable under section 901 to such person, or under section 960 to United States shareholders of such person, for foreign taxes paid during the taxable year shall be reduced by an amount equal to the product of—
(1) the amount of the credit which, but for this section, would be allowed under section 901 for the taxable year, multiplied by
(2) the international boycott factor (determined under section 999).
(b) Application with sections 275(a)(4) and 78
Section 275(a)(4) and section 78 shall not apply to any amount of taxes denied credit under subsection (a).
(Added Pub. L. 94–455, title X, § 1061(a), Oct. 4, 1976, 90 Stat. 1649; amended Pub. L. 115–97, title I, § 14301(c)(28), Dec. 22, 2017, 131 Stat. 2224.)
heading: Editorial Notes
heading: Amendments
text: 2017—Subsec. (a). Pub. L. 115–97 struck out “902 or” after “or under section” in introductory provisions.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 2017 Amendment
text: Amendment by Pub. L. 115–97 applicable to taxable years of foreign corporations beginning after Dec. 31, 2017, and to taxable years of United States shareholders in which or with which such taxable years of foreign corporations end, see section 14301(d) of Pub. L. 115–97, set out as a note under section 78 of this title.
heading: Effective Date
text: Pub. L. 94–455, title X, § 1066(a), Oct. 4, 1976, 90 Stat. 1654, provided that:
“(1) General rule.—
The amendments made by this part (other than by section 1065) [enacting this section and section 999 of this title and amending sections 952 and 995 of this title] apply to participation in or cooperation with an international boycott more than 30 days after the date of enactment of this Act [Oct. 4, 1976].
“(2) Existing contracts.—
In the case of operations which constitute participation in or cooperation with an international boycott and which are carried out in accordance with the terms of a binding contract entered into before September 2, 1976, the amendments made by this part (other than by section 1065) apply to such participation or cooperation after December 31, 1977.”
26 U.S.C. § 913 (INTERNAL REVENUE CODE)
[§ 913. Repealed. Pub. L. 97–34, title I, § 112(a), Aug. 13, 1981, 95 Stat. 194]
text: Section, added Pub. L. 95–615, title II, § 203(a), Nov. 8, 1978, 92 Stat. 3100; amended Pub. L. 96–222, title I, § 108(a)(1)(B), (F), Apr. 1, 1980. 94 Stat. 223, 225; Pub. L. 96–608, § 1(a), Dec. 28, 1980, 94 Stat. 3550, related to a deduction for certain expenses of living abroad.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of Repeal
text: Repeal applicable with respect to taxable years beginning after Dec. 31, 1981, see section 115 of Pub. L. 97–34, set out as an Effective Date of 1981 Amendment note under section 911 of this title.
26 U.S.C. § 921...927 (INTERNAL REVENUE CODE)
[§§ 921 to 927. Repealed. Pub. L. 106–519, § 2, Nov. 15, 2000, 114 Stat. 2423]
text: Section 921, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 985, provided for exclusion from gross income of exempt foreign trade income.
text: A prior section 921, acts Aug. 16, 1954, ch. 736, 68A Stat. 290; Oct. 4, 1976, Pub. L. 94–455, title XIX, § 1901(a)(116), 90 Stat. 1784, defined Western Hemisphere trade corporation, prior to repeal by Pub. L. 94–455, title X, § 1052(b), Oct. 4, 1976, 90 Stat. 1648, effective with respect to taxable years beginning after Dec. 31, 1979.
text: Section 922, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 986, defined FSC’s.
text: A prior section 922, acts Aug. 16, 1954, ch. 736, 68A Stat. 291; Dec. 10, 1971, Pub. L. 92–178, title V, § 502(c), 85 Stat. 550; Oct. 4, 1976, Pub. L. 94–455, title X, § 1052(a), (c)(1), 90 Stat. 1647, 1648; Nov. 6, 1978, Pub. L. 95–600, title III, § 301(b)(15), 92 Stat. 2822, related to a special deduction for a Western Hemisphere trade corporation, prior to repeal by Pub. L. 94–455, title X, § 1052(b), Oct. 4, 1976, 90 Stat. 1648, effective with respect to taxable years beginning after Dec. 31, 1979.
text: Section 923, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 986; amended Pub. L. 99–514, title XVIII, § 1876(b)(3), Oct. 22, 1986, 100 Stat. 2898, related to exempt foreign trade income.
text: Section 924, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 987; amended Pub. L. 99–514, title XVIII, § 1876(e)(2), (l), Oct. 22, 1986, 100 Stat. 2899, 2901, related to foreign trading gross receipts.
text: Section 925, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 990, related to transfer pricing rules.
text: Section 926, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 991, related to distributions to shareholders.
text: Section 927, added Pub. L. 98–369, div. A, title VIII, § 801(a), July 18, 1984, 98 Stat. 991; amended Pub. L. 99–514, title XVIII, § 1876(a)(1), (e)(1), (f)(1), (p)(5), Oct. 22, 1986, 100 Stat. 2897, 2899, 2902; Pub. L. 100–647, title I, § 1012(bb)(8)(A), Nov. 10, 1988, 102 Stat. 3536; Pub. L. 101–508, title XI, § 11704(a)(10), Nov. 5, 1990, 104 Stat. 1388–518; Pub. L. 103–66, title XIII, § 13239(a), Aug. 10, 1993, 107 Stat. 509; Pub. L. 105–34, title XI, § 1171(a), Aug. 5, 1997, 111 Stat. 987, related to other definitions and special rules.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of Repeal
text: Repeal applicable to transactions after Sept. 30, 2000, with special rules relating to existing foreign sales corporations, see section 5 of Pub. L. 106–519, set out as an Effective Date of 2000 Amendments note under section 56 of this title.
26 U.S.C. § 933 (INTERNAL REVENUE CODE)
§ 933. Income from sources within Puerto Rico
The following items shall not be included in gross income and shall be exempt from taxation under this subtitle:
(1) Resident of Puerto Rico for entire taxable year
In the case of an individual who is a bona fide resident of Puerto Rico during the entire taxable year, income derived from sources within Puerto Rico (except amounts received for services performed as an employee of the United States or any agency thereof); but such individual shall not be allowed as a deduction from his gross income any deductions (other than the deduction under section 151, relating to personal exemptions), or any credit, properly allocable to or chargeable against amounts excluded from gross income under this paragraph.
(2) Taxable year of change of residence from Puerto Rico
In the case of an individual citizen of the United States who has been a bona fide resident of Puerto Rico for a period of at least 2 years before the date on which he changes his residence from Puerto Rico, income derived from sources therein (except amounts received for services performed as an employee of the United States or any agency thereof) which is attributable to that part of such period of Puerto Rican residence before such date; but such individual shall not be allowed as a deduction from his gross income any deductions (other than the deduction for personal exemptions under section 151), or any credit, properly allocable to or chargeable against amounts excluded from gross income under this paragraph.
(Aug. 16, 1954, ch. 736, 68A Stat. 293; Pub. L. 99–514, title XII, § 1272(d)(3), Oct. 22, 1986, 100 Stat. 2594.)
heading: Editorial Notes
heading: Amendments
text: 1986—Pub. L. 99–514 inserted “, or any credit,” in pars. (1) and (2).
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 1986 Amendment
text: Amendment by Pub. L. 99–514 applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 1277 of Pub. L. 99–514, set out as a note under section 931 of this title.
26 U.S.C. § 934A (INTERNAL REVENUE CODE)
[§ 934A. Repealed. Pub. L. 99–514, title XII, § 1275(c)(3), Oct. 22, 1986, 100 Stat. 2599]
text: Section, added Pub. L. 97–455, § 1(a), Jan. 12, 1983, 96 Stat. 2497, related to income tax rate on Virgin Islands source income.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of Repeal
text: Repeal applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 1277 of Pub. L. 99–514, set out as an Effective Date of 1986 Amendment note under section 931 of this title.
26 U.S.C. § 935 (INTERNAL REVENUE CODE)
[§ 935. Repealed. Pub. L. 99–514, title XII, § 1272(d)(2), Oct. 22, 1986, 100 Stat. 2594]
text: Section, added Pub. L. 92–606, § 1(a), Oct. 31, 1972, 86 Stat. 1494; amended Pub. L. 108–357, title VIII, § 908(c)(4), Oct. 22, 2004, 118 Stat. 1656, related to coordination of United States and Guam individual income taxes.
heading: Statutory Notes and Related Subsidiaries
heading: Amendment Subsequent to Repeal
text: Pub. L. 108–357, title IX, § 908(c)(4), (d), Oct. 22, 2004, 118 Stat. 1656, 1657, applicable to taxable years ending after Oct. 22, 2004, amended section, as in effect before the effective date of its repeal, in introductory provisions of subsec. (a), by substituting “who, during the entire taxable year” for “for the taxable year who”, in subsecs. (a)(1) and (b)(1)(B), by inserting “bona fide” before “resident”, in subsec. (b)(1)(A), by inserting “(other a bona fide resident of Guam during the entire taxable year)” after “United States”, and, in subsection (b)(2), by striking out “residence and” before “citizenship”.
heading: Effective Date of Repeal
text: Repeal applicable to taxable years beginning after Dec. 31, 1986, with certain exceptions and qualifications, see section 1277 of Pub. L. 99–514, set out as an Effective Date of 1986 Amendment note under section 931 of this title.
26 U.S.C. § 936 (INTERNAL REVENUE CODE)
[§ 936. Repealed. Pub. L. 115–141, div. U, title IV, § 401(d)(1)(C), Mar. 23, 2018, 132 Stat. 1206]
text: Section, added Pub. L. 94–455, title X, § 1051(b), Oct. 4, 1976, 90 Stat. 1643; amended Pub. L. 94–455, title XIX, § 1901(b)(37)(B), Oct. 4, 1976, 90 Stat. 1803; Pub. L. 95–600, title VII, § 701(u)(11)(A), (B), Nov. 6, 1978, 92 Stat. 2917; Pub. L. 97–248, title II, § 201(d)(8)(B), formerly § 201(c)(8)(B), § 213(a), Sept. 3, 1982, 96 Stat. 420, 452, renumbered § 201(d)(8)(B), Pub. L. 97–448, title III, § 306(a)(1)(A)(i), Jan. 12, 1983, 96 Stat. 2400; Pub. L. 98–369, div. A, title IV, § 474(r)(22), title VII, § 712(g), title VIII, § 801(d)(11), July 18, 1984, 98 Stat. 843, 947, 997; Pub. L. 99–499, title V, § 516(b)(1)(B), Oct. 17, 1986, 100 Stat. 1770; Pub. L. 99–514, title II, § 231(d)(3)(G), title VII, § 701(e)(4)(I), title XII, §§ 1231(a)–(d), (f), 1275(a)(1), title XVIII, § 1812(c)(4)(C), Oct. 22, 1986, 100 Stat. 2179, 2343, 2561–2563, 2598, 2835; Pub. L. 100–647, title I, §§ 1002(h)(3), 1012(h)(2)(B), (j), (n)(4), (5), title VI, § 6132(a), Nov. 10, 1988, 102 Stat. 3370, 3502, 3512, 3515, 3721; Pub. L. 101–382, title II, § 227(a), Aug. 20, 1990, 104 Stat. 661; Pub. L. 101–508, title XI, § 11704(a)(11), Nov. 5, 1990, 104 Stat. 1388–518; Pub. L. 103–66, title XIII, § 13227(a), (b), Aug. 10, 1993, 107 Stat. 489, 490; Pub. L. 104–188, title I, §§ 1601(a), 1704(t)(37), (80), Aug. 20, 1996, 110 Stat. 1827, 1889, 1891; Pub. L. 108–357, title IV, § 402(b)(2), Oct. 22, 2004, 118 Stat. 1492; Pub. L. 110–172, § 11(g)(12), Dec. 29, 2007, 121 Stat. 2490; Pub. L. 113–295, div. A, title II, § 221(a)(12)(G), Dec. 19, 2014, 128 Stat. 4038; Pub. L. 115–97, title I, § 14221(a), Dec. 22, 2017, 131 Stat. 2218, related to Puerto Rico and possession tax credit.
heading: Statutory Notes and Related Subsidiaries
heading: Savings Provision
text: For provisions that nothing in repeal by Pub. L. 115–141 be construed to affect treatment of certain transactions occurring, property acquired, or items of income, loss, deduction, or credit taken into account prior to Mar. 23, 2018, for purposes of determining liability for tax for periods ending after Mar. 23, 2018, see section 401(e) of Pub. L. 115–141, set out as a note under section 23 of this title.