calendar year, determined by substituting calendar year 2020 for calendar year 2016 in subparagraph (A)(ii) thereof. Any increase determined under this clause shall be rounded to the nearest multiple of $100,000. (4) Application of certain rules Rules similar to the rules of subparagraphs (A), (B), (C), and (D) of subsection (a)(4) shall apply for purposes of this subsection. (d) Treatment of payments For purposes of section 1324 of title 31, United States Code, the payments under this section shall be treated in the same manner as a refund due from a credit provision referred to in subsection (b)(2) of such section. . (b) Clerical amendment The table of sections for chapter 77 of such Code is amended by adding at the end the following new item: Sec. 7529. Application of earned income tax credit to possessions of the United States. . C Child tax credit 221. Child tax credit fully refundable for 2020 through 2025 (a) In general Section 24(h)(5) of the Internal Revenue Code of 1986 is amended to read as follows: (5) Refundable credit The increase determined under the first sentence of subsection (d)(1) shall be the amount determined under subparagraph (A) of such subsection (determined without regard to paragraph (4) of this subsection). . (b) Effective date The amendment made by this section shall apply to taxable years beginning after December 31, 2019. 222. Application of child tax credit in possessions (a) In general Section 24 of the Internal Revenue Code of 1986 is amended by adding at the end the following new subsection: (i) Application of credit in possessions (1) Mirror code possessions (A) In general The Secretary shall pay to each possession of the United States with a mirror code tax system amounts equal to the loss to that possession by reason of the application of this section (determined without regard to this subsection) with respect to taxable years beginning after 2019. Such amounts shall be determined by the Secretary of the Treasury based on information provided by the government of the