Tax Deadline 2024 Extension California. Our due dates apply to both calendar and fiscal tax years. California tax extension 2024 deadline the california tax deadline extension covers tax filing and payment deadlines initially falling between january 21, 2024, and june 17, 2024.

15, 2024, to file their tax return, though payments are still due on june 17, 2024. You must send payment for taxes in california for the fiscal year 2024 by april 15, 2025.