Error Message: "Form 3582. Amount Due must be entered" But Turbo Tax will not let me enter any number

I'm amending my 2020 tax return because of a W-2c correcting HSA contributions and related wages and taxes withheld.  I'm at Review and about to file.

 

From this error message, I'm clicking to Forms where I can see that 3582 is a CA State payment voucher with a blank amount due.  I don't owe any taxes for this amended return (Turbo Tax box says $0).  

 

I've tried all variations of entering numbers.  Mostly Turbo Tax beeps at me as if I'm not supposed to enter anything there.  Sometimes it has sent me to a form starting with that number (e.g. 1 has taken me to Form 1040).  And I've tried tabbing through the form to ensure I'm in the right spot.

 

This seems like a glitch.  My software is up to date.  Do you have a solution or workaround?  Can I just leave the error and try to file this amendment anyway?