So, in your situation, did your tenant live there all year? Was it only part of the time? Any part of the year where there was no tenant, it is strictly personal use. So, you are going to have to divide space for the time she was there and also take into consideration the time. Any common areas are personal.
In going through the program this year, I haven't run across it asking if you want TurboTax to do the math. It may be up to you.
Please see this LINK for more information.
