If you've Efiled your Federal return and it has been Accepted, you should then be able to file your Nebraska return separately.
Your message sounds like it may be a connectivity issue. If you're using TurboTax Online, clear your Cache and Cookies and try Efiling Nebraska again. If you're using TurboTax Desktop, try a Manual Update and then Efiling Nebraska again.
If you still get the error, I would suggest you Delete your Nebraska return, and step through the interview again to let it repopulate and try Efiling.
You could also try disabling your anti-virus programs. Here's How to Turn Off Anti-Virus Programs.
Let us know if your issue still persists, and we'll try to help. You can also Contact TurboTax Support.
Here's more info on Filing Federal and State Returns Separately.
@Marlene63
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
