I am doing the same thing. I also found it confusing that the program (online) says they will ask about dividing it up for the rental portion in the rental section, but when you get to the tax break section, there's no reminder to only enter the portion related to when it was not a rental. For me, I entered the whole thing (since I lived in the house before moving out to become both a landlord and renter) but am correcting it now.
