HS Code is the meaning of customs code, customs code query website. The top six digits of the import and export customs code are internationally common, so the top six digits of the customs code can be queried about the tax rate of the domestic export tariff and the import tariff of the United States
HS Code Customs Code Enquiry website:
https://www.hsbianma.com

Enter the name of the product you want to query the customs code in the search box and click Search. Such as LED lights, you can find the customs code and export tariff rate of LED lights.

LED lamp export tax rebate rate is 13%, then the product export tax rebate amount is the total value of the goods ×13%
Total value = Total value of goods on commercial invoice of products
Us import tax rate inquiry and US tariff inquiry calculation method:
https://www.usniuku.com/news-show-216