That's probably true.  However, they have been filing tax returns since 1992 in the state of CA and the state has never objected to the filings nor told them to register.  Proseries thinks that just turning off the error checking will fix it - but it doesn't.  I was hoping someone had a work around.  For now, I'm going to print the return, add a note to it, and mail it to the state.  We'll see what they say.  The Form 109 has to be mailed anyway, so they will get both together.