as follows: (2) Credit amount Subsection (a) shall be applied by substituting $3,000 ($3,600 in the case of a qualifying child who has not attained age 6 as of the close of the calendar year in which the taxable year of the taxpayer begins) for $1,000 . . (b) Effective date The amendment made by this section shall apply to taxable years beginning after December 31, 2019. D Dependent care assistance 231. Refundability and enhancement of child and dependent care tax credit (a) In general Section 21 of the Internal Revenue Code of 1986 is amended by adding at the end the following new subsection: (g) Special rules for 2020 and 2021 In the case of any taxable year beginning in 2020 or 2021— (1) Credit made refundable In the case of an individual other than a nonresident alien, the credit allowed under subsection (a) shall be treated as a credit allowed under subpart C (and not allowed under this subpart). (2) Increase in applicable percentage Subsection (a)(2) shall be applied— (A) by substituting 50 percent for 35 percent , and (B) by substituting $120,000 for $15,000 . (3) Increase in dollar limit on amount creditable Subsection (c) shall be applied— (A) by substituting $6,000 for $3,000 in paragraph (1) thereof, and (B) by substituting twice the amount in effect under paragraph (1) for $6,000 in paragraph (2) thereof. (4) Inflation adjustment of dollar amounts In the case of any taxable year beginning after 2020, the $120,000 amount in paragraph (2)(B) and the $6,000 amount in paragraph (3)(A) shall each be increased by an amount equal to— (A) such dollar amount, multiplied by (B) the cost-of-living adjustment determined under section 1(f)(3) for the calendar year in which the taxable year begins, determined by substituting 2019 for 2016 in subparagraph (A)(ii) thereof. If any increase determined under this paragraph is not a multiple of $100, such increase shall be rounded to the next lowest multiple of $100. (5) Income limitation (A) In general Paragraphs (1) through (4) of this subsection shall not apply to