Updating prior year entries so they match what you see in later years

Hello, 

 

I'm in the unfortunate circumstance of working on e-filing my 2021 taxes but did not finish and submit my 2020 taxes.   Since I'm partially done with 2020 there are entries in there that 2021 tries to give me a comparison of my entries as I go along.   But those 2020 numbers are not accurate.   How can I make TT 2021 update those number as I change and work through 2020?   Is it automatic?  how does 2021 know when 2020 is changing?   I've not submitted either yet but would like to e-file 2021 before the deadline. Then paper file 2020.     

 

Thank you!