Hello,
I faced same issue today, and called customer care. Customer care representative was also clueless about this issue.
I tried modifying Form 1040 line 5b (from where california state form is taking social security related data).
I deleted California State Taxes related form which is complaining about this error going through clicking on forms on right most top corner, and selecting that form. Then retry again to file california state tax, and it goes through without generating this error as well creating same new form (which was previously deleted where it was giving complain.)
Hope this help !
Regards,
Mayank
