To verify the tax rate for a location: Find a list of the latest sales and use tax rates at the following link: California City & County Sales & Use Tax Rates. You can look up a tax rate by address; Visit or call our Offices; Call our Customer Service Center at 1-800-400-7115 (TTY:711). Sacramento — The Franchise Tax Board announced special tax relief for California taxpayers affected by the COVID-19 pandemic. Affected taxpayers are granted an extension to file 2019 California tax returns and make certain payments to June 15, 2020, for all tax filings and payments due between March 15, 2020, through June 15, 2020. California City & County Sales & Use Tax Rates (effective January 1, 2020) These rates may be outdated. For a list of your current and historical rates, go to the California City & County Sales & Use Tax Rates webpage.. Look up the current sales and use tax rate by address