You need to file a federal tax return, if your income is over the filing requirement. For most people that is $14,600. If you are, or can be, a dependent, it may be less, depending on the source of your income. Details at:
https://www.irs.gov/individuals/check-if-you-need-to-file-a-tax-return
If you don't need to file a federal return, you do not need to file a California state return.
https://www.ftb.ca.gov/file/personal/do-you-need-to-file.html
For quick links to all State Filing Requirements: https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/need-file-state-return/L446Rv...
