I believe this may be a developing issue. Something may be broken. I myself have seen 4 users report this in just the last few hours that they cannot efile the state return even though the Federal return had previously been accepted.
Are you using desktop software (CD/download) or Online TurboTax?
I've notified the Moderators.
Hold off for now. Phone Customer Support if you don't get any info in this thread later today.
Hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern) 7 days/week.
You can use this contact form to get a phone number:
https://support.turbotax.intuit.com/contact
