California City and County Sales and Use Tax Rates
Tax rates available by City or by County. For an history of sales and use tax rates in California see Publication 71.
California State Board of Equalization
Their mission is to serve the public through fair, effective, and efficient tax administration. To find information on California tax laws, property taxes, local tax statements, sales and use tax. Also forms for property taxes and others.
California State Controller's Office
This site provides access to government financial reports, unclaimed property laws and regulations, as well as tax publications.
Tax and Accounting Sites Directory
"Tax and Accounting Sites Directory is a comprehensive index of web-based tax and accounting resources. The directory is designed to be a starting point for people who are searching for tax and accounting information and services.
From the Librarian Index to the Internet. Includes Web sites related to tax forms and publications, income tax preparation, taxation, auditing, sales tax, flat tax, tax-related finance sites, the IRS and state taxation agencies, and finally (how we need it during tax season) a bit of humor.