When doing Federal and State taxes, you must start with Federal, of course.

Once Federal info is correct, I check it carefully by reviewing the forms and worksheets in the Print Center.

However, once you start the State process, you can no longer get access to the Federal forms, unless you pay for the State.  This is problematic.  In my case, once I started the State process, it mutilated my data (see other posts) and I was in a panic to recover the ton of data I had entered in the Federal forms.  Ha! Gotcha, now access to the Federal Forms is blocked and I have to pay for the State form before I can get access.  However, I do not want to pay for the State form as it has too many bugs in it and even corrupted my Federal Data!

This is very troubling.