What Is The Tax Deadline For 2025 For California Residents. From the key deadlines to when tax season officially kicks off, we’ll cover everything, including tips on when to expect your federal and state refunds and how to avoid. The fbar (report of foreign bank and financial accounts) is due april 15th, but u.s.

April 15 with automatic extension to october 15. The filing deadline for california state tax returns is april 15, 2024.