Investors & landlords

A room in our house was rented for the first 60 of the 365 days last year (we were just helping someone out).  

Do I enter expenses for the whole year and then TurboTax fractions out the expenses?  It seems that I should only enter expenses (utilities, repairs, taxes, interest, etc.) for the time it was rented out, but the interview includes a statement to the effect that enter the taxes (or interest??) and TurboTax will figure it out.