You should start with Schedule E (Rental Income and Royalties) first. Enter your
total mortgage interest there as well as the property tax (and your other expenses associated with renting the house). When you indicate that you rented the house out for only 2 months out of 12, TurboTax will reduce the deduction on Schedule E to 1/6th of what you entered (2 months divided by 12); then TurboTax will carry the rest of your interest and property tax over to Schedule A for you automatically.
