"Can not e-file" error although nothing changed from last year

[tc2001]

Last year I was able to e-file with a 1040-SR no problem.  This year with no changes in any filing situation I get an error saying that because there are zero amounts in lines such-and-such, I can't e-file - but it was zero amounts in those same lines last year, when I could e-file no problem.  All the checks said everything was fine at both Federal and State level.  So I have to mail the returns in - why has this changed for this year?

[Kat]

You may want to wait a bit and try again.  It's still relatively early in the filing season, and TurboTax has quite a few "bugs" that are being worked out.

It may be that you'll be able to successfully e-file a little later.

[tc2001]

Wait??  Too late, I've already mailed the returns in.  But thanks.  I can't wait to see if I "may be" able to e-file some undetermined time "later"...

[Kat]

Okay.  The mailed returns may take lots longer to process (at least the federal one).  As I understand it, the IRS is still behind on paper returns from 2019 and 2020.  

Best of luck!