You don't account for it anywhere on your tax forms (or in Turbotax) It was simply a 2nd home and nothing (not utilities, insurance or maintenance) is deductible except mortgage interest and real estate taxes. Those are deductible, on schedule A, as itemized deductions. After entering your primary mortgage interest ad RE taxes, you will be asked if you have any additional to enter.
If you made any improvements or had fix-up costs to get it ready to rent, those are added to your cost basis and depreciated.