@Carl wrote:
More than likely the IRS would required a 3115 to be filed.
Form 3115 cannot be used to make an adjustment to basis, which would be considered to be a "mathematical or posting error" rather than an impermissible method of accounting.
See Rev. Proc. 2018–31
See also https://proconnect.intuit.com/community/proseries-tax-discussions/discussion/rental-property-has-had...
