Streamlined Sales Tax

Streamlined Sales Tax (SST) is a program that simplifies the process of collecting sales and use tax on business operating in multiple states.

Indiana is one of 24 participating states that work to simplify tax laws, apply standard tax definitions, use 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.