Investors & landlords

The only thing you need to consider when selling a rental property is the basis of the home when it was placed into service and started depreciation, the depreciation taken along the way, any possible improvements added to the depreciation  and the sales price + cost of sale.   All the lines between your first point and the last are immaterial.   You may want to either upgrade to LIVE for more assistance or seek local professional help for this year's return so you fully understand what is happening.    If you have NOT been taking depreciation all these years then RUN to a local tax pro to get this situation corrected properly on the 2020 return.  This correction on form 3115 is not a DIY project and the TT program will not help you at all.