Amending

I have marked my rentals as 'Non-passive income all along' in my taxes.  When I go back to each prior year, and change from non-passive to passive I get the following -
        
        2017 -    Refund of $1100 in Federal and $400 in State
        2018 -    Refund of $20
        2019 -    No Change
 
1.  Do I need to amend 2018 and 2019 just to show my change from non-passive to passive?
 
2.   For 2017, if I do an amendment for federal and state, will I need to amend 2018 and 2019 to show the refund amount received from amending 2017?  OR will I just need to report the income I will receive from this amendment in my 2021 taxes.
 
3.  Both of my rental properties were checked for Qualified Business Income (QBI) deduction.  Is that correct?