If the property has been placed in service as a rental and is available for rent all year, then the property is used 100% for rental purposes (i.e., no proration of expenses).
TurboTax will ask you whether you converted the property to personal use and then expenses will be allocated accordingly.
Lastly, if the property was taken out of service as a rental, then typical rental expenses are not deductible. If, however, the property was available for rental use during any repairs, then typical rental expenses are deductible.
