I was (and am) looking at the prior year's (2021) "Form 4562 Depreciation and Amortization Report" and it shows everything as a 39 year life to be straight-lined so I don't think your possibility is what is going on here. The lion's share is the acquisition of the home itself, which was bought in April of 1995 and put in service in September of that same year. I was finally able to get some higher-level help at TurboTax and they advised me that they could not fix this (nor explain it) and that re-importing last year's data from scratch had risks too (and I was at the end, doing my final checks, when i found this error and so starting over was not a good option) and so they advised me to enter all of the items manually (both regular and AMT amounts), based on the prior years' report so I did. It seemed to work fine and is now producing the same straight-line amounts for 2022 as in 2021, so I am good to go now, I guess. I assume, if your fully depreciated hypothesis was correct, it would not have produced these results for 2022. I am hoping that I won't have to do this manually each year. They say that such should not be necessary, that it was probably some sort of a one-time glitch.
Your answer does make me wonder about all my (entire home) improvements, such as kitchen remodel/upgrade, that are listed as 39 years under MACRS. Are you saying that 39 years for that is not allowed? I also find it confusing that it is listed as non-residential property although I am hoping that is because it is an office for my Schedule C business, albeit a home (aka residential) office.
Thanks much for all your help.
