I know I need to amend 2019, as I received amended K-1 for both years. The amendments were due to depreciation basis for a real estate investment, that caused depreciation expense that was too low and a basis in the property that was incorrect. This mistake in 2020 also affects my 2021 return. Both were prepared and filed with Turbo Tax premier? How do I go about amending both 2020 and 2021 returns. Will I have to redo the 2021 return from scratch importing information from corrected 2020 return?
