was it rented for less than 15 days?
- the tax rules say in that case treat the residence as all personal. you do not report rental income or rental expenses. thus all mortgage interest and taxes go on schedule A
if 15 days or more you prorate mortgage interest and taxes and other expenses - personal potion of taxes and interest get reported on Schedule A
rental portion of interest and taxes not limited to rental income, other rental expenses are limited to remaining rental income if any, are subject to ordering rule, but carryovers are allowable.
