@Carl wrote:
If you told the program that you are renting below fair market rental value (most common when renting to family) then your deductible expenses are limited to the amount of rental income received...
Per Section 280A, every day the property is rented a below fair rental constitutes a day of personal use.
As such, the only expenses that can potentially be deducted are mortgage interest, property taxes, and casualty losses (all on Schedule A).
