After you file

Also check your data entry for any mistakes, especially commas and decimal points. 

 

And be aware that there were some tax law changes from 2020 to 2021.  For example, the first $10,200 of unemployment comp is no longer deductible. Another change for 2021 is the return of required minimum distributions — amounts that must be withdrawn from most retirement accounts by a certain age — after being waived in 2020.