Same error, unable to efile either federal or state.
This is probably due to a sw bug somewhere, so I would consider the followings are all nonsense solutions:
1. do you have internet connection?
2. do you have firewall blocking turbotax?
3. did you try to restart your turbo tax?
4. did you try to restart to restart your computer?
I am pretty sure if I hop on a phone call, a clueless agent would easily cycle me through these actions without getting anywhere after an hour of effort based on the comments here. Typical of what customer service is like in US.
