Basically, you complete the tax return and the program does all that for you.
if you sold the property in 2020 and want to get an idea of your 2020 tax liability, then you can act "AS IF" you sold it in 2019. But be forewarned, if you use the online version of TurboTax for this, *DO* *NOT* *DO* *NOT* use the same online account you used to complete you "real" 2019 tax return. With the online version, one account, one return. If you start a 2nd return with the same online account you used for the first return, then the first tax return you completed will be overwritten and lost FOREVER!!!! There is no possible way to recover it.
