The web Browser you are currently using is unsupported, and some features of this site may not work as intended. Please update to a modern browser such as Chrome, Firefox or Edge to experience all features Michigan.gov has to offer.
Step 3: Register for SIGMA
The below Enrollment Types must have their Social Security Number (SSN) or Employer Identification Number (EIN)/Tax Identification Number (TIN) enrolled with SIGMA Vendor Self Service (VSS) prior to starting the enrollment process in CHAMPS. www.Michigan.gov/SIGMAVSS
- Individual/Sole Proprietor
Rendering/Servicing only Enrollment Type does not have to register with SIGMA.