After you file

About the only significant changes for 2020 I could think of:

1) ...is IF your 2020 income was below the stimulus payment cutoff, and IF you didn't receive a stimulus payment in 2020, then you might get that applied to your 2020 taxes as a credit. 

or

2)  IF you took a Covid-related distribution from retirement account in 2020, then the 10% penalty may be waived.   (could also have the payment taxed over 3 years instead of all at once)

____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*