The California Department of Tax and Fee Administration (CDTFA) is the public agency charged with assessing and collecting sales and use taxes, as well as a variety of excise fees and taxes, for the U.S. state of California. The department has several other ancillary functions, such as ensuring that sellers comply with permit requirements. The department was formed on January 1, 2018, by the Taxpayer Transparency and Fairness Act of 2017, which reduced the California State Board of Equalization to its constitutional functions of supervising county tax assessors and assessing certain specified types of property.