Limitation based on adjusted gross income
7 rules
(A) In general The amount allowable as a deduction under subsection (a) (after application of paragraph (1)) shall be reduced (but not below zero) by $100 for each $1,000 by which the taxpayer’s modified adjusted gross income exceeds $150,000 ($300,000 in the case of a joint return).
(B) Modified adjusted gross income For purposes of this paragraph, the term “modified adjusted gross income” means the adjusted gross income of the taxpayer for the taxable year increased by any amount excluded from gross income under section 911, 931, or 933.