If you use a dwelling unit as a residence and rent it for fewer than 15 days during the year, you don’t report any of the rental income; it’s tax free. But you can’t deduct any expenses as rental expenses.
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.