If you're referring to your federal refund, then follow the instructions on this website:
https://www.taxpayeradvocate.irs.gov/get-help/refunds/lost-or-stolen-refund/#:~:text=Call%20the%20IR....
If you're referring to a California state income tax refund, then follow the instructions on this website:
https://www.ftb.ca.gov/refund/help-refund.html#Contact-us-about-refunds
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
