@ld4runner wrote:
.....if I proceed without amending prior years or changing accounting method......
One final note about foregone depreciation deductions and amending prior returns is that you must file Form 3115 (and make a 481(a) adjustment for missed deductions) if you filed returns where you missed those deductions for two consecutive tax years (e.g., if you missed depreciation deductions on your 2021 and 2022 returns).
See https://www.irs.gov/publications/p946#en_US_2023_publink1000107386
Adoption of accounting method defined.
Generally, you adopt a method of accounting for depreciation by using a permissible method of determining depreciation when you file your first tax return, or by using the same impermissible method of determining depreciation in two or more consecutively filed tax returns.
