It depends. Generally, only forms and schedules need to be attached; no worksheets. Below are the CA instructions for attachments.
"Other than Schedule A (Form 1040) or Schedule B (Form 1040), did you attach any federal forms or schedules to your federal Form 1040 or 1040-SR?
If No, do not attach a copy of your federal Form 1040 or 1040-SR return to Form 540.
If Yes, attach a copy of your federal Form 1040 or 1040-SR return and all supporting federal forms and schedules to Form 540.
Exception: If you did not itemize deductions on your federal tax return but will itemize deductions on your California tax return, complete and attach a copy of the federal Schedule A (Form 1040) to Form 540.
Do not attach any documents to your tax return unless specifically instructed. This will help us reduce government processing and storage costs."
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