In my case, there were some issue of my 401k distribution due to job change, which ended up with "mail-file only", although I already paid Turbotax efile fee even for my state. I made a phone call to Turbo tax customer service to explain this issue. Eventually, they refunded my efile fee.
I expected that Turbotax should let me know for "not-eligible-efile" situation during final review.
Hopefully, this is helpful for you.
