had the same exact issue, tried two different IPS, Two different Brower's including clearing history, going back over entire return.
BUT THE ANSWER WAS!!! a hitch in email address I use what's called plus email address, but I also used advance + email address such as myname+taxes/[email address removed] - this not only helps me sort emails but also figure out who is sending me spam.. TURBOTAX does not like the / switch and that was my issue. if you use a similar email with special charters. this might be it
