October – Federal Specific
October 15
Individuals: If you have an automatic 6-month extension to file your income tax return for previous year, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, and penalties due.
October 15
Employers: Social security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in September.
Non-payroll withholding: If the monthly deposit rule applies, deposit the tax for payments in September.
October – State Specific
Resellers: File and pay state sales taxes you have collected as obliged by the California State Board of Equalization (BOE) on the date of this month that BOE has designated for you.
October 15
Individuals: Extended due date for previous year income tax returns
October – County Specific
October – City Specific
