1. Permanent modification of individual rate brackets
“(1) In general—In the case of a child to whom this subsection applies for the taxable year, the amount of tax imposed by this section on such child shall be determined as provided in paragraphs (2) and (3).
“(2) Modifications to applicable rate brackets—The income tax table otherwise applicable under this section to the child shall be applied with the following modifications:
“(A) 24-percent bracket—The maximum taxable income which is taxed at a rate below 24 percent shall not be more than the sum of—
“(i) the earned taxable income of such child, plus
“(ii) the minimum taxable income for the 24-percent bracket in the table under subsection (e) (as adjusted under subsection (f)) for the taxable year.
“(B) 35-percent bracket—The maximum taxable income which is taxed at a rate below 35 percent shall not be more than the sum of—
“(i) the earned taxable income of such child, plus
“(ii) the minimum taxable income for the 35-percent bracket in the table under subsection (e) (as adjusted under subsection (f)) for the taxable year.
“(C) 37-percent bracket—The maximum taxable income which is taxed at a rate below 37 percent shall not be more than the sum of—
“(i) the earned taxable income of such child, plus
“(ii) the minimum taxable income for the 37-percent bracket in the table under subsection (e) (as adjusted under subsection (f)) for the taxable year.
“(3) Coordination with capital gains rates—For purposes of applying subsection (h)—
“(A) the maximum zero rate amount shall not be more than the sum of—
“(i) the earned taxable income of such child, plus
“(ii) the amount in effect under subsection (h)(12)(A)(iv) for the taxable year, and
“(B) the maximum 15-percent rate amount shall not be more than the sum of—
“(i) the earned taxable income of such child, plus
“(ii) the amount in effect under subsection (h)(12)(B)(iv) for the taxable year.
“(4) Earned taxable income—For purposes of this subsection, the term earned taxable income means, with respect to any child for any taxable year, the taxable income of such child reduced (but not below zero) by the net unearned income of such child.”
“(12) Maximum amounts defined—For purposes of this subsection—
“(A) Maximum zero rate amount—The maximum zero rate amount shall be—
“(i) in the case of a joint return or surviving spouse, $77,200,
“(ii) in the case of an individual who is a head of household (as defined in section 2(b)), $51,700,
“(iii) in the case of any other individual (other than an estate or trust), an amount equal to ½ of the amount in effect for the taxable year under clause (i), and
“(iv) in the case of an estate or trust, $2,600.
“(B) Maximum 15-percent rate amount—The maximum 15-percent rate amount shall be—
“(i) in the case of a joint return or surviving spouse, $479,000 (½ such amount in the case of a married individual filing a separate return),
“(ii) in the case of an individual who is the head of a household (as defined in section 2(b)), $452,400,
“(iii) in the case of any other individual (other than an estate or trust), $425,800, and
“(iv) in the case of an estate or trust, $12,700.
“(C) Inflation adjustment—In the case of any taxable year beginning after 2018, each of the dollar amounts in subparagraphs (A) and (B) shall be increased by an amount equal to—
“(i) such dollar amount, multiplied by
“(ii) the cost-of-living adjustment determined under subsection (f)(3) for the calendar year in which the taxable year begins, determined by substituting “calendar year 2017” for “calendar year 2016” in subparagraph (A)(ii) thereof.”