It is possible for a state form to be ready for efile before the print version of the form is finalized and available (or vice versa). What specific CA form are you referring to that has that notice on it?
You can check availability of California forms with this table.
State Forms Availability Table:
https://ttlc.intuit.com/community/forms/help/state-forms-availability-table-for-turbotax-individual-...
