@Topsy10 I would file an extension for this year and discuss with some local CPAs before amending your returns. I have done a ton of research and discussed w/ multiple CPAs and amending does not appear to be the appropriate resolution as your accounting will still be off from TTX using an erroneous Basis from the start.
The 3115 appears to be the appropriate path to get this resolved properly. As you've seen some on this forum will claim you cannot use the 3115 because it is not a "method change", but there are MANY scenarios for the use of 3115 and there are numerous articles that state 3115 can be used for depreciation corrections.
One of the simplest is this H&R Block article that states:
- You claimed more or less than the allowable depreciation on a depreciable asset.
https://www.hrblock.com/tax-center/income/real-estate/catch-up-depreciation-on-rental-property/
I am working with a 30 year veteran CPA who has experience with this form and she does not have any doubts that the request will be approved.
Best of luck
