I have the exact same problem, presumably for the same reason - I had 2 forms in 2023 and used the Supporting Documents option. Deleting the form appears to fix the problem. But I have the same question for TurboTax: if this is an old known problem, why hasn't it been fixed? Or at least, why hasn't the standard TurboTax help been updated to say what to do? Like the original poster I have been expecting this to be fixed for about 4 weeks, and the default "Help" just adds to the frustration.
