If you're using the desktop product (CD/download), here are a couple of things you can try in the meantime, although it may not help any. But it might at least rule out some things.
With your return open, in the top left corner of TurboTax, in the menubar click on the FILE menu, and in the dropdown choose "Electronic Filing." Then in the next menu choose "Check Electronic Filing Status" which will hopefully say "accepted."
Then SAVE the return.
I'd then close TurboTax and relaunch it.
Then try to efile the state return.
If problem persists, I'd probably close TurboTax, reboot the computer, re-launch TurboTax, and do a "check for updates." And try again to efile state.
If still unsuccessful, you can phone Customer Support if you wish, or wait to see if any further info is forthcoming in this thread.
