UPDATED 6.7.23 What are the affected Counties?All Counties in California EXCEPT FOR: LASSEN More information on SHASTA & MODOC county due dates can be found HERE Below information was last UPDATED 3.3.23 Dear Clients and Friends, IRS and the FTB have agreed to postpone all filing and payment deadlines for taxpayers in affected California counties … Continue reading October 16, 2023 Deadline Extension for Disaster Affected California Counties.