dependent (other than a qualifying child) of the taxpayer. (b) Limitation based on adjusted gross income The amount of the credit allowable under subsection (a) shall be reduced (but not below zero) by $50 for each $1,000 (or fraction thereof) by which the taxpayer's modified adjusted gross income exceeds $400,000 in the case of a joint return ($200,000 in any other case). For purposes of the preceding sentence, the term “modified adjusted gross income” means adjusted gross income increased by any amount excluded from gross income under section 911, 931, or 933. (c) Qualifying child