Quick Links Look Up Sales & Use Tax Rates Geographic Information System (GIS) How-To Videos Contact Us Getting Started on SUTS How To Register a New User How to Add an Existing Business to Your SUTS Account How to Apply for a New Colorado Account Number (CAN) & Register for SUTS Introduction to the Sales & Use Tax System How To File a Return Using SUTS How to Look Up Sales Tax Rates How To Make a Payment Excel Upload Instructions File Using XML