The only solution I found was to return TurboTax and use Tax Act.
Don't want to come across as snarky but Intuit was of no help - with their repeated "clear cache, reboot, try a different computer, etc" less than helpful solutions. Something is/was clearly wrong with their server and I didn't want to keep trying.
Tax Act worked right away. And I was able to get a refund on Turbo Tax.
