Question: How to verify a sales tax license
or tax exemption certificate.
The Department of Revenue offers a 24-hour, automated service for those wanting to verify a Colorado sales tax license or sales tax exemption certificate for a specific business or organization. You can determine whether the license of exemption certificate is valid through Revenue Online Under "Other Services", choose Verify a Sales Tax License. You must know the sales tax account number or exemption certificate number as assigned by the Department of Revenue.
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