Tax Deadline 2025 San Diego County Ca. 2025 estimated tax payments normally due on april 15, 2025. 2025 estimated tax payments normally due on april 15, 2025.
Individuals and businesses with their principal residence or place of business in san diego county will have until june 17, 2025, to file certain california individual and business tax. 2025 estimated tax payments normally due on april 15, 2025.