Streamlined Sales Tax

Streamlined Sales Tax (SST) is a multi-state initiative to reduce the burden of collecting, reporting and remitting sales and use tax across state lines for businesses.

Participating states continue to implement tax law simplifications, apply standard tax definitions, utilize common forms and procedures, and certify tax administration software, to ease tax collection in full member and associate member states.

If you have Indiana specific Streamlined Sales Tax questions, contact Indiana Department of Revenue (DOR) by email or call us at (317) 233-4015.


All businesses wishing to become members of Streamlined Sales Tax must register at the following national registration site. Upon receipt of a national registration, DOR will send instructions, if any, for the business to register with the State of Indiana.