Tax Deadline 2025 California Extended Tax. โ irs postpones various tax filing and tax payment deadlines for storm and flooding victims in san diego county in california. There is a difference between how california treats businesses vs federal.
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. The extended tax due date for californians living in affected areas is nov.