Tax Deadline 2024 California Extension. You must send payment for taxes in california for the fiscal year 2024 by march 15, 2025. Payments due on june 17 remain due on that date.

You can extend the due date for filing your personal income tax return by six months (e.g., to october 15, 2024, for 2023 tax year returns) by filing form 4868 or making an electronic tax payment before the april 15 (or april 17) deadline. Individual income tax returns and payments normally due on april 15, 2024.