May 15

Employers: Social security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments in April.

Non-payroll withholding: If the monthly deposit rule applies, deposit the tax for payments in April.

May – 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.

May – County Specific

May – City Specific