. . . after you enter all your data, does it go ahead and run all the calculations for you and show you the final result prior to asking for money? And if so, could you print it out at that point and use it as a guide to fill out a 1040 longhand?

Nah, I'd think they anticipated that and disallowed it.

But ya never know . . .

I use TurboTax and I don't mind paying the fee for e-file; using their online forms is easy and convenient. If you want free tax forms, you can get them from the local library.