How do e-filing payments work?

I'm at the TurboTax 2020 screen titled "E-file Your Federal Return for FREE".  It's giving me a choice of E-file or "File by mail".   If I e-file, do I have to pay by credit card?    Conversely, if I want to pay by check, does that mean I can't e-file?  Nothing on this screen talks about this.  Searching the help files just turns up endless unrelated special situations.

 

Thanks in advance
Ben