SEC. 2. INCREASE IN AND MODIFICATION OF CHILD TAX 
CREDIT. 
(a) IN GENERAL.—Section 24 of the Internal Rev-
enue Code of 1986 is amended— 
(1) by amending subsection (a) to read as fol-
lows: 
‘‘(a) ALLOWANCE OF CREDIT.—There shall be al-
lowed as a credit against the tax imposed by this chapter 
for the taxable year an amount equal to the sum of— 
‘‘(1) $2,000 for each qualifying child of the tax-
payer, and 
‘‘(2) $500 for each dependent of the taxpayer 
(as defined in section 152, without regard to all that 
follows ‘resident of the United States’ in section 
152(b)(3)(A)) other than a qualifying child.’’, 
(2) in subsection (b)— 
(A) by striking ‘‘the threshold amount’’ in 
paragraph (1) and inserting ‘‘$400,000 in the 
case of a joint return ($200,000 in any other 
case)’’, 
(B) by striking paragraph (2), and 
(C) by striking ‘‘LIMITATIONS’’ and all 
that follows through ‘‘The amount’’ and insert-
ing ‘‘LIMITATION BASED ON ADJUSTED GROSS 
INCOME.—The amount’’, 
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(3) in subsection (d)(1)(A), by striking all that 
follows ‘‘under this section’’ and inserting the fol-
lowing: ‘‘determined— 
‘‘(i) by substituting ‘$1,400’ for 
‘$2,000’ in subsection (a)(1), 
‘‘(ii) without regard to subsection 
(a)(2), and 
‘‘(iii) without regard to this subsection 
and the limitation under section 26(a).’’, 
(4) in subsection (d)(1)(B)(i), by striking 
‘‘$3,000’’ and inserting ‘‘$2,500’’, 
(5) by inserting after subsection (d)(2) the fol-
lowing new paragraph: 
‘‘(3) ADJUSTMENT
FOR
INFLATION.—In the 
case of a taxable year beginning after 2018, the 
$1,400 amount in paragraph (1)(A) shall be in-
creased by an amount equal to— 
‘‘(A) such dollar amount, multiplied by 
‘‘(B) the cost-of-living adjustment deter-
mined under section 1(f)(3) for the calendar 
year in which the taxable year begins, deter-
mined by substituting ‘2017’ for ‘2016’ in sub-
paragraph (A)(ii) thereof. 
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If any increase under this paragraph is not a mul-
tiple of $100, such increase shall be rounded to the 
next lowest multiple of $100.’’, 
(6) by amending subsection (e) to read as fol-
lows: 
‘‘(e) IDENTIFICATION REQUIREMENTS.— 
‘‘(1) TAXPAYER.—No credit shall be allowed 
under this section if the identifying number of the 
taxpayer was issued after the due date for filing the 
return for the taxable year. 
‘‘(2) QUALIFYING CHILD.— 
‘‘(A) IN GENERAL.—No credit shall be al-
lowed under this section to a taxpayer with re-
spect to any qualifying child unless the taxpayer 
includes the social security number of such 
child on the return of tax for the taxable year. 
‘‘(B) SOCIAL
SECURITY
NUMBER
DE-
FINED.—For purposes of this subsection, the 
term ‘social security number’ means a social se-
curity number issued to an individual by the 
Social Security Administration, but only if the 
social security number is issued— 
‘‘(i) to a citizen of the United States 
or pursuant to subclause (I) (or that por-
tion of subclause (III) that relates to sub-
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clause (I)) of section 205(c)(2)(B)(i) of the 
Social Security Act, and 
‘‘(ii) before the due date for such re-
turn. 
‘‘(C) TREATMENT
OF
QUALIFYING
CHIL-
DREN
DISALLOWED
CREDIT.—In the case of 
any qualifying child with respect to whom a 
credit is not allowed under this section by rea-
son of subparagraph (A), such child shall be 
treated as a dependent to whom subsection 
(a)(2) applies.’’, and 
(7) by striking subsection (h). 
(b) EFFECTIVE DATE.—The amendments made by 
this section shall take effect as if included in the enact-
ment of section 11022 of Public Law 115–97. 
Æ 
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