Under the current Québec sales tax (QST) legislation, businesses based in Québec must be registered and must remit provincial sales tax. However, businesses who do not have a physical establishment in the province but who are selling goods / services to Québec consumers via online sales are not currently required to register and remit QST.
Many Québec-based businesses feel that this has created a competitive disadvantage, and as a result, effective September 1st, 2019, certain e-commerce businesses outside Québec will be required to register for the QST using a dedicated online service.