California Tax Return Deadline 2024 Filing. You must send payment for taxes in california for the fiscal year 2024 by march 15, 2025. The california tax deadline extension covers tax filing and payment deadlines initially falling between january 21, 2024, and june 17, 2024.

Pay the amount you owe by april 15, 2024 to avoid penalties and interest. The tax filing deadline for california state income tax returns has been extended to may 17 along with the federal tax filing deadline.