Investors & landlords

my renters left in 2019. i converted the rental to personal use on 1/1/2020 but I still lived in my primary residence. do i have to actually live in the unit at all in order to claim mortgage interest and taxes on Sched A? Also, I subsequently sold the unit on 3/3/2021, where in TT do I show this sale...in "Sale of Business or Rental Property" section or somewhere else?