CA taxes non-residents on income from work actually (physically) performed inside CA. As to whether or not you need to file a non-resident CA tax return, see "Do I Need To File?" in this reference:
https://www.ftb.ca.gov/file/personal/residency-status/part-year-and-nonresident.html
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
