What is the Harmonized Tariff System?

The Harmonized Tariff System is a coding system used by both exporters and importers to assign a number to a particular product. The assigned numbers help classify products so that applicable tariffs can be assessed. In addition exporters of products from the United States need the appropriate Schedule B number as well as the Harmonized System number for necessary paperwork including shipping documents like the Shipper’s Export Declaration and Certificates of Origin.

The Schedule B search engine can be accessed here.