Turbotax isn't designed to handle a situation like yours. It can't handle depreciation that is on and off and to boot, you didn't take depreciation as required in 2018. the IRS says you have to compute your gain as if you took the 2018 depreciation. you can't amend 2018 because the method you used was an impermissible method requiring filing form 3115 for 2020 to catch up. also complicating matters is the fact that 1 unit was used as your personal residence for 5 or 6 months. you may be entitled to a partial home sale exclusion but this too is complicated because you first rented, then converted to your home, then back to rental. your reason for moving out was job-related. there are rules regarding the home sale exclusion in your situation.
