Tax Return Deadline 2024 California State. The deadline is october 15, 2024. The due date to file your california individual or fiduciary income tax return and pay any balance due is april 15, 2024.

3, 2025, deadline also applies to any payment normally due during this period, including the quarterly estimated tax payments due on june 17, 2024, sept. In this section, we’ll outline the key deadlines, including the california business tax filing deadline for 2024.