San Diego County Tax Filing Deadline 2024. Quarterly payroll and excise tax returns normally due on jan. 2024 estimated tax payments normally due on april 15, 2024.
The tax relief postpones various tax filing and payment deadlines that occurred from jan. Affected taxpayers in san diego county have until june 17, 2024, to fulfill their tax obligations, including filing federal tax returns and making payments initially due during this period.