the table under section 1(c), and inserting 12 percent, 25 percent, . (11) Section 3402(q)(1) is amended by striking the product of third lowest rate of tax applicable under section 1(c) and and inserting 25 percent of . (12) Section 3402(r)(3) is amended by striking the amount of tax which would be imposed by section 1(c) (determined without regard to any rate of tax in excess of the fourth lowest rate of tax applicable under section 1(c)) on an amount of taxable income equal to and inserting an amount equal to the product of 25 percent multiplied by . (13) Section 3406(a)(1) is amended by striking the product of the fourth lowest rate of tax applicable under section 1(c) and and inserting 25 percent of . (14) Section 6103(e)(1)(A)(iii) is amended by inserting (as in effect on the day before the date of the enactment of the Tax Cuts and Jobs Act ) after section 1(g) . (c) Effective date The amendments made by this section shall apply to taxable years beginning after December 31, 2017. B Simplification and reform of family and individual tax credits 1101. Enhancement of child tax credit and new family tax credit (a) Increase in credit amount and addition of other dependents (1) In general Section 24(a) is amended to read as follows: (a) Allowance of credit There shall be allowed as a credit against the tax imposed by this chapter for the taxable year an amount equal to the sum of— (1) with respect to each qualifying child of the taxpayer, $1,600, and (2) for taxable years beginning before January 1, 2023, with respect to the taxpayer (each spouse in the case of a joint return) and each dependent of the taxpayer to whom paragraph (1) does not apply, $300. . (2) Conforming amendments (A) Section 24(c) is amended— (i) by redesignating paragraphs (1) and (2) as paragraphs (2) and (3), respectively, (ii) by striking 152(c) in paragraph (2) (as so redesignated) and inserting 7706(c) , (iii) by inserting before paragraph (2) (as so redesignated) the following new paragraph: (1) Dependent (A) In general The term