But in 2020, TurboTax changed the life to 39 years for some unknown reason, and for 2021, it is also shown as 39 years. In 2020 I also installed a new central AC system, and that is also showing with a life of 39 years instead of 27.5 years.
I just did some testing. Most likely, you choose non-residential rental property, which would be depreciated over 39 years. You should have chosen residential rental property. If this is your case, you'll need to amend the 2020 tax return. Keep in mind that after amending, you'll need to restart your 2021 return from scratch in order to import the corrected amounts for prior years depreciation, as well as PAL carry overs if you have any.
