The program has 2 places to enter the expenses ... ones that are common to both rental & personal (like the annual insurance, re taxes, mortgage interest, etc. ) which will be prorated based on the rental/personal use ratio by the program automatically AND the rental only expenses (where you can make those summer rental specific cost entries). You will need to do all the math yourself and keep good records incase the IRS audits the return. Non common expenses like utilities incurred for the personal portion are NOT required to be entered since they have no effect on the Sch E ... carefully review the worksheets when you are done before you file ... make corrections if needed.
