Are you doing a 1040X? If so Check the box for Amending federal return, the put 1 in the next box and select the dropdown for CA.  If your not amending federal don't check the box, but that next 1 to amend state is probably what is missing.

https://proconnect.intuit.com/community/individual/help/how-to-amend-an-individual-return-1040x-orig...