Is my reason of changing from a non permissible method (no previous depreciation taken) to a permissible method (Depreciation under 168 MACRS using mid-month straight line method over 27.5 year life) valid and what I should state on Form 3115? What calculation do I use to populate the 481(a) adjustment to income in Part 4? The amount I will claim on the 2018 amended return depreciation? The total depreciation up to 2018?
The thread I mentioned previously ("What should I do if I didn't claim depreciation on my rental property" dated Jan 10, 2022 which says "Solved" by TurboTax) shows step by step instruction on completing Form 3115. It shows two options: one amended returns up to 3 years and the other a change in accounting method for the current year and going back as far as you need to go using Form 3115. I say this because I need guidance on how I need to complete Form 3115 based on calculating all previous years but amending returns from 2018, 2019, 2020. I assume I only file this Form once with amended 2018. Then file amended 2019 and 2020 and then current 2021.
