amendments made by this section shall apply to taxable years beginning after December 31, 2017. (2) Conforming amendment The amendment made by subsection (c) shall apply to taxable years beginning after December 31, 2021. C Business-related provisions I Corporate provisions A 20-percent tax rate 13001. 20-percent corporate tax rate (a) In general Subsection (b) of section 11 is amended to read as follows: (b) Amount of tax The amount of the tax imposed by subsection (a) shall be 20 percent of taxable income. . (b) Conforming amendments (1) The following sections are each amended by striking section 11(b)(1) and inserting section 11(b) : (A) Section 280C(c)(3)(B)(ii)(II). (B) Paragraphs (2)(B) and (6)(A)(ii) of section 860E(e). (C) Section 7874(e)(1)(B) (2) (A) Part I of subchapter P of chapter 1 is amended by striking section 1201 (and by striking the item relating to such section in the table of sections for such part). (B) Section 12 is amended by striking paragraphs (4) and (6), and by redesignating paragraph (5) as paragraph (4). (C) Section 453A(c)(3) is amended by striking or 1201 (whichever is appropriate) . (D) Section 527(b) is amended— (i) by striking paragraph (2), and (ii) by striking all that precedes is hereby imposed and inserting: (b) Tax imposed A tax . (E) Sections 594(a) is amended by striking taxes imposed by section 11 or 1201(a) and inserting tax imposed by section 11 . (F) Section 691(c)(4) is amended by striking 1201, . (G) Section 801(a) is amended— (i) by striking paragraph (2), and (ii) by striking all that precedes is hereby imposed and inserting: (a) Tax imposed A tax . (H) Section 831(e) is amended by striking paragraph (1) and by redesignating paragraphs (2) and (3) as paragraphs (1) and (2), respectively. (I) Sections 832(c)(5) and 834(b)(1)(D) are each amended by striking sec. 1201 and following, . (J) Section 852(b)(3)(A) is amended by striking section 1201(a) and inserting section 11(b) . (K) Section 857(b)(3) is amended— (i) by striking subparagraph (A) and redesignating