At the very least, there should be a diagnostic indicating the form is not ready,

They must be working on it.

https://proconnect.intuit.com/community/schedule-k-1/help/shareholder-s-basis-faqs/00/5349

I agree that there should be a diagnostic showing up in the critical diagnostics or at least the informational.  Nothing at this time??

I completely agree;  if they are working on the Form 7203 --they need a critical diagnostic that we should not file a tax return that requires it--without it.

srjcpa posted in another 7203 list:

https://proconnect.intuit.com/community/lacerte-tax-idea-exchange/7203/idi-p/192171

George's link on 1/27/2022 says the same thing. Not supported.