A Federal return and state return can be efiled at the same time, but a state return cannot be efiled by itself unless an efiled Federal return has previously been accepted. So if you didn't efile a Federal return, you cannot efile a state return, unless your state tax agency allows one to be filed on its website.
Why were you unable to efile the Federal return? Maybe someone can help you fix it so you can efile it. Or did you already file it by printing, signing, and mailing it out? (TurboTax does not mail it for you.)
