Summary of California Law. (2nd floor, 348.02 C128wb) 10th ed. 16 vols. San Francisco: Witkin Legal Institute, 2005.
Complete California Codes - From the State Capitol includes full-text searching of all the California Codes by keyword.
California Code of Regulations (CCR) contains the text of the regulations that have been formally adopted by state agencies, reviewed and approved by the Office of Administrative Law, and filed with the Secretary of State.
California Laws Relating to Minors (Ref 346.0135 C128) Santa Ana, CA: Pacific Law, 2018.
California Income Tax Forms, Instructions and Publications are available here; this site also has links to the Internal Revenue Service Federal Income Tax Forms.