need to amend a return for for 2021

I made a mistake on a my 2021 tax return.  I did not know that I had started to receive rent from inherited rental property overseas.  Lack of communication with Executors.  Rent payments started in Sept 2021-  With allowed property depreciation - I will not end up paying any tax - should I fix up the 2021 return before I submit my 2022 - as the date I will need to use for depreciation of property will be Sept 2021 and and it might be a red flag as I have not mentioned on 2021 return.

 

I filed 2021 taxes with H and R block - can I transfer it into Turbo Tax ?

Do I Redo the whole return or just the missing parts?

Thanks