If you don't find a form here, please call 619-446-5000. Using our online services, you can file a return, make a payment, submit a claim for refund, file an appeal and much more.The following forms may be used during the process to appeal your property tax assessment. Most forms are in Adobe Acrobat Reader format. A collection of all the forms and and documents that are posted on the San Diego Housing Commission's (SDHC) website, listed in one location. All businesses operating in the City of San Diego are required to obtain a Business Tax Certificate. This includes home-based businesses. Information for international scholars at UC San Diego. If you need to start service and are not a CPS Energy customer, please request a letter of reference. We considered your application for recognition of exemption from federal income tax under Internal Revenue Code (IRC) Section 501(a).