Canada Border Services Agency (CBSA) has updated their Customs Tariff for 2021.
Canada is the United States’ largest trading partner for exports and 3rd largest for imports. Here is a link to the Canada Customs Tariff 2021. For 10 digit harmonized codes, the first 6 are universal and the last 4 differ from country to country.
https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/2021/menu-eng.html
CBSA maintains a robust, user friendly website. Here are several links that may be helpful for traders:
https://www.cbsa-asfc.gc.ca/agency-agence/program-eng.html
https://www.cbsa-asfc.gc.ca/export/guide-eng.html
https://www.cbsa-asfc.gc.ca/import/guide-eng.html
https://www.cbsa-asfc.gc.ca/import/courier/lvs-efv/menu-eng.html