Coordination with section 469 This subsection shall be applied after the application of section 469. . (b) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2017. III Tax benefits for families and individuals 11021. Increase in standard deduction (a) In general Subsection (c) of section 63 is amended by adding at the end the following new paragraph: (7) Special rules for taxable years 2018 through 2025 In the case of a taxable year beginning after December 31, 2017, and before January 1, 2026— (A) Increase in standard deduction Paragraph (2) shall be applied— (i) by substituting $18,000 for $4,400 in subparagraph (B), and (ii) by substituting $12,000 for $3,000 in subparagraph (C). (B) Adjustment for inflation (i) In general Paragraph (4) shall not apply to the dollar amounts contained in paragraphs (2)(B) and (2)(C). (ii) Adjustment of increased amounts In the case of a taxable year beginning after 2018, the $18,000 and $12,000 amounts in subparagraph (A) shall each be increased by an amount equal to— (I) such dollar amount, multiplied by (II) the cost-of-living adjustment determined under section 1(f)(3) for the calendar year in which the taxable year begins, determined by substituting 2017 for 2016 in subparagraph (A)(ii) thereof. . (b) Effective date The amendment made by this section shall apply to taxable years beginning after December 31, 2017. 11022. Increase in and modification of child tax credit (a) In general Section 24 is amended by adding at the end the following new subsection: (h) Special rules for taxable years 2018 through 2025 (1) In general In the case of a taxable year beginning after December 31, 2017, and before January 1, 2026, this section shall be applied as provided in paragraphs (2) through (8). (2) Credit amount Subsection (a) shall be applied by substituting $2,000 for $1,000 . (3) Limitation In lieu of the amount determined under subsection (b)(2), the threshold amount shall be $500,000. (4) Definition of qualifying child