Resolved: I had this problem. I know this is a old question but I just had this problem in 2025 when filing my 2024 tax. Tried all the normal troubleshooting. Turns out it was a billing issue with my premium plan.
What I ended up doing was upgrading to an assisted plan, then was able to advance past the "review your order" step. After, I simply downgraded back down to the premium plan.
I figured this out on my own after calling support twice and spending over an hour on the phone with no resolution other than to call back.
