If you are making payments towards a Notice of Determination (billing) and believe you do not owe the amount due or believe you have been overcharged, you may now file a claim for refund using the CDTFA's Online Services Login page. File a return or make a payment online by logging into our secure site using your username and password. Online registration is a convenient, fast, and free way to register online for a permit, license, or account with the CDTFA. CDTFA administers sales and use tax in addition to several special taxes and fees. Received a Letter or Notice? File online by logging in to our secure site using your username and password. We offer convenient online filing services for eligible accounts. If you have been affected by a California disaster, please refer to our State of Emergency Tax Relief page for a list of declared disasters and instructions on how to apply for relief. How Do I… When Are Wait Times Longest? Online registration is a convenient, fast, and free way to register online for a permit, license, or account with the CDTFA. You have been successfully logged out. You may now close this window. Using our online services, you can file a return, make a payment, submit a claim for refund, file an appeal and much more. If you have an online services profile, log in with your username and password to our secure website to get started. Retailers engaged in business in California must register with the California Department of Tax and Fee Administration (CDTFA) and pay the state's sales tax, which applies to all retail sales of goods and merchandise except those sales specifically exempted by law. Register for new business permits, licenses, and accounts or add business locations. Use your online account to pay sales and use tax and most of the special tax and fee programs. Log in to MyFTB to check your refunds, payment history, account details, view notices and correspondence.