Cal. Rev. & Tax. Code § 36035

Each licensed firearms dealer, firearms manufacturer, or ammunition vendor subject to the excise tax imposed pursuant to this part shall register for a certificate of registration with the department using electronic media in a form prescribed by the department and shall set forth the name under which the applicant transacts or intends to transact business, the location of their place or places of business, and any other information as the department may require. An application for a certificate of registration shall be authenticated in a form or pursuant to methods as may be prescribed by the department. No fee shall be charged for the application for, or issuance of, the certificate of registration.