I just noticed that between 2019 and 2020 tax years, TurboTax changed the depreciation life for a new roof that had been on the depreciation schedule for my rental house since 2015. In 2019, the asset was shown with a life of 27.5 years and SL/MM depreciation method as I expected, same as the main rental house. 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. Can I fix this using the step-by-step interview, or do I need to override in forms? Do I need to file an amended return for 2020 if I make the change in 2021? Will TurboTax calculate the correct prior depreciation or do I need to do some override for that also?
