Product classification begins with finding the correct classification for your product in the Harmonized Tariff Schedule of the United States (HTS or HTSUS) maintained by the USITC. The HTS is accessible at https://hts.usitc.gov/. If you are new to using the HTS or want a refresher, the USITC developed this online tutorial to assist users in understanding how to use the HTS that you may find helpful: https://learning.usitc.gov/hts-guide/index.html. The HTS is maintained by the Office of Tariff Affairs and Trade Agreements https://www.usitc.gov/offices/tata.