Tax Filing Deadline 2024 San Diego County. 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. Individual income tax returns and payments normally due on april 15, 2024,.

21, 2024, through june 17, 2024 (postponement period). 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.