Frankly, in your scenario, it is easier to simply tell TurboTax that the property was rented all year in the Property Profile section (i.e., answer "YES") and then do the split yourself, which would likely only be mortgage interest, property taxes and insurance.
That will work just fine also, as the program will figure things from the date you placed it in service, depending on your specific selections; such as selecting to let the program automatically do the splits with mortgage interest ad property taxes for you.
When you get to the Deductions & Credits section (which has absolutely nothing what-so-ever to do with the SCH E in the Rentals & Royalties section), read the small print. All of it. Depending on earlier selections you may have made, the small print "MAY" tell you that property taxes and mortgage interest for the period of time it was personal use, has already been figured automatically and entered for you, and you do not enter that information again in the Deductions and Credits section.
