Your date of conversion back to personal use is the day after the last renter moved out. Doesn't matter that you were undecided for three months on what to do. Your days rented is every single day from Jan 1 to the day the renter moved out. Your personal use days is ZERO. Your business use percentage is ONE HUNDRED PERCENT.
For personal use days and business use percentage, the program is asking you for the days you lived in it for "any" personal use *while the property was classified as a rental*. That will be ZERO days.
