Estimated Taxes AFTER filing a return

Hello. I've already filed my 2021 return and am only now realizing I may need to make estimated taxes (freelance income I had not anticipated). Is it possible to go back into TurboTax (I'm using the desktop version) and get help estimating taxes for next year?

 

If so, how would I do that? The only instructions I've seen say that "with the return open, search for '1040-es,'" but when I do that, all that comes up is help navigating my main 1040 form. 

 

Thank you.