Married persons who file separately are barred from claiming certain tax credits, such as the adoption credit or education credits. However, there is no such bar for the low-income housing credit.
Items, such as interest, state and local income and sales taxes, charitable contributions, and medical deductions, claimed on Schedule A of Form 1040. Itemized deductions are subtracted from adjusted gross income to arrive at taxable income. The amount of itemized deductions is also subject to a reduction when adjusted gross income exceeds certain limits.