Effective September 1, 2019, certain suppliers that reside outside Quebec and non-residents of Canada that are registered for Goods and Services Tax/Harmonized Sales Tax (GST/HST) who make supplies of corporeal moveable property, intangible personal property (IPP) and/or services to individual consumers in Quebec and certain operators of digital platforms may be required to be Quebec Sales Tax (QST) registrants.
Source Michaela Merz