San Diego County Tax Filing Deadline 2024. San diego county individuals and businesses impacted by severe storms and flooding that began on january 21, 2024, qualify for an extension to file, and pay taxes until. Individuals and businesses with their principal residence or place of business in san diego county will have until june 17, 2024, to file certain california individual and business tax.

Affected individuals and businesses in san diego county now have until june 17 to file their tax returns and pay federal and state taxes due between january 21 through june. 2024 estimated tax payments normally due on april 15, 2024.