I already filed my 2020 taxes but did not know I had to complete 1040-ES for estimated taxes here. I got back in and filled in the information. Do I need to refile?

[808kyliet]

If not, where can I find the 1040ES for 2021 to print out and mail ?

[NCperson]

no need to refile. 

you can get blanks on IRS.gov