@Totalconnect wrote: how do I add info to a mail return
I checked "mail my return" so I could see it, now Turbotax won't let me change it.
Does that mean you want to go back to the interview to change something, but TurboTax thinks you were finished, so the interview is closed?
As long as you haven't actually mailed it or efiled, you can make any changes before filing. To get back into the return interview, go to the TAX HOME and look for a link "Add a State." That doesn't really add one, but opens the interview back up.
NOTE: If you originally selected to file by mail, and as long as you didn't actually mail it, you can change that filing method to efile, if desired.