Streamlined Sales Tax (SST)

SST Registration
CAUTION: This link takes users to the national SST site to register with multiple states. If you need to register with Utah for a sales and use tax license, click here.
SST Amnesty Program
SST Petition for Membership
SST Compliance Checklist
SST Certificate of Mailing and Service
SST Governing Board Forms, Certificates and Instructions
SST Taxability Matrix

Update:

In 2007, the Streamlined Sales and Use Tax Agreement was amended to allow states the option of taxing instate sales of tangible personal property at the point of sale. This change allows Utah to keep its current rules for instate sales and be in compliance with the Agreement.

During the 2008 General Session, the Utah Legislature adopted H.B. 206, Tax Amendments. This bill (effective Jan. 1, 2009) brings Utah into compliance with the Streamlined Sales Tax Agreement, as follows:

Allows certified service providers relief from liability for relying on Tax Commission-certified software or databases.
Allows amnesty for sellers who voluntarily sign up with the other states that are part of the SST Agreement.
Provides a monetary allowance for voluntary filers.
Requires non-nexus out-of-state sales to be taxes using the rate at the point of delivery rather than the lowest common combined rate.
Broadens the dental prosthetic exemption.