Business Tax Electronic Filing – Save Time, Effort and Postage! Please see the sections below.Effective October 01, 2022, the Treasurer-Tax Collector will no longer be handling the Greater Palm Springs assessment. Applications. Form Number, Form Name. If you are planning to conduct business in the City of Riverside you must obtain a City of Riverside business license, also referred to as a business tax. Complete all boxes even if currently enrolled and no change is being made. Blank or empty box(es) will replace your current contribution to zero: Regular. Subdivision Map Forms.