When renting a part of your primary residence that you own, the rental percentage is that percentage of the property that is "exclusive to the renter". Assuming you rented out rooms that were exclusive to the renter(s) for the entire tax year, the days it was rented would be 365, and the days of personal use would be zero.
Also, check the depreciation taken for that first year by figuring it manually and comparing it to what TurboTax figures. My bet is, Turbotax will be wrong by quite a big margin. If it is, post back and I'll help you make the program figure it correctly so you won't have to over ride, thus invalidating the 100% Accuracy Guarantee and disabling your ability to e-file.
To figure the depreciation manually, use IRS Publication 946 at https://www.irs.gov/pub/irs-pdf/p946.pdf. Use the MACRS worksheet that starts on page 37. The table that applies for this is table A-6 on page 71.
