Today, March 11, I also got an error message trying to e-file. I called Turbo Tax support and was told it is a known technical problem on Turbo Tax's end. It sh...
Form 2210 for Tax year 2021 won't be available until Fev 17, 2022 according to this site:https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbot...