Special rules

If—

(A) an individual who is married and who files a separate return— (i) maintains as his home a household which constitutes for more than one-half of the taxable year the principal place of abode of a qualifying individual, and (ii) furnishes over half of the cost of maintaining such household during the taxable year, and

(B) during the last 6 months of such taxable year such individual’s spouse is not a member of such household,

such individual shall not be considered as married.

If—

(A) section 152(e) applies to any child with respect to any calendar year, and

(B) such child is under the age of 13 or is physically or mentally incapable of caring for himself,

in the case of any taxable year beginning in such calendar year, such child shall be treated as a qualifying individual described in subparagraph (A) or (B) of subsection (b)(1) (whichever is appropriate) with respect to the custodial parent (as defined in section 152(e)(4)(A)), and shall not be treated as a qualifying individual with respect to the noncustodial parent.

No credit shall be allowed under subsection (a) for any amount paid by the taxpayer to an individual—

(A) with respect to whom, for the taxable year, a deduction under section 151(c) (relating to deduction for personal exemptions for dependents) is allowable either to the taxpayer or his spouse, or

(B) who is a child of the taxpayer (within the meaning of section 152(f)(1)) who has not attained the age of 19 at the close of the taxable year.

For purposes of this paragraph, the term “taxable year” means the taxable year of the taxpayer in which the service is performed.

No credit shall be allowed under subsection (a) for any amount paid to any person unless—

(A) the name, address, and taxpayer identification number of such person are included on the return claiming the credit, or

(B) if such person is an organization described in section 501(c)(3) and exempt from tax under section 501(a), the name and address of such person are included on the return claiming the credit.

In the case of a failure to provide the information required under the preceding sentence, the preceding sentence shall not apply if it is shown that the taxpayer exercised due diligence in attempting to provide the information so required.