You can ask questions about the HTS using the Commission’s “Ask Us a Tariff Question” portal (https://www.usitc.gov/tariff_affairs/hts_help). Your question will be directed to staff in our Office of Tariff Affairs and Trade Agreements (TATA), who will be able to give you informal technical assistance and guidance. For formal tariff classification rulings, you will need to contact the U.S. Customs and Border Protection (CBP) (https://www.cbp.gov/trade/rulings).