Software Developers | Sales Tax XML
The department grants approval to sales tax software companies for the e-file format XML (Extensible Markup Language). XML is similar to the Streamlined Sales Tax forms used by other states. After department approval is granted, Excel spreadsheets must be uploaded through Revenue Online. If you represent a sales tax software company, your sales tax data in XML format must be tested and approved by the department prior to using it. For information on how to test this format and apply for approval, please see the Test Files below. For detailed information on XML Filing, please see XML Common Questions.
Colorado XML Vendor Tests
Approved Vendors (Updated August 30, 2019)