San Diego County Tax Filing Deadline 2024. The san diego housing commission has paid out $1.3 million to hundreds of families affected by january’s flooding, but 90 families have yet to apply, and the deadline to apply is august 31. San diego county residents and businesses now have until june 17 to file individual and business tax returns and pay federal taxes, the internal revenue service announced tuesday.

Photo courtesy san diego county tax collector’s office. Irs postpones various tax filing and tax payment deadlines for storm and flooding victims in san diego county in california.