In general

The term “qualifying relative” means, with respect to any taxpayer for any taxable year, an individual—

(A) who bears a relationship to the taxpayer described in paragraph (2),

(B) whose gross income for the calendar year in which such taxable year begins is less than the exemption amount (as defined in section 151(d)),

(C) with respect to whom the taxpayer provides over one-half of the individual’s support for the calendar year in which such taxable year begins, and

(D) who is not a qualifying child of such taxpayer or of any other taxpayer for any taxable year beginning in the calendar year in which such taxable year begins.

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In general

Official source

The term “qualifying relative” means, with respect to any taxpayer for any taxable year, an individual—

(A) who bears a relationship to the taxpayer described in paragraph (2),

(B) whose gross income for the calendar year in which such taxable year begins is less than the exemption amount (as defined in section 151(d)),

(C) with respect to whom the taxpayer provides over one-half of the individual’s support for the calendar year in which such taxable year begins, and

(D) who is not a qualifying child of such taxpayer or of any other taxpayer for any taxable year beginning in the calendar year in which such taxable year begins.