It sounds like the forms are ready for e-file but not to be mailed. Whatever the reason is for the return to be mailed, you should wait until they are ready.
On the other side, some states claim that you cannot mail in the return if you used software to prepare, so the "do not mail" will always be on that return. However if mailed, they usually accept it. I would wait a couple of weeks if that is an option, to see if the printed returns will delete the "E-file only."
