If, after E-filing Federal, you go back to the start of File a Return, and select 'file by mail', it does in fact recall that you already e-filed, I assume I can just print and mail the state, not print the federal.
The real problem here is that, the whole point of using tax software is to be sure that you are not missing something. And, by using quasi- workarounds, like backtracking, you don't really know if its done all the right checking. For example, if you go back earlier in the interview forms, and change a number somewhere it might update everything correctly, or it might not - you probably need to go back through the rest of the interviews & checks to be sure. But, like with most software things, I am generally impressed when the less used features work correctly, considering the complexities that can be involved. They should consider adding an actual in-line step for printing the file-by-mail - there are sometimes good and valid reasons to not e-file.