Validate a QST Registration Number
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You can use this service to validate a business’s QST registration number.
You can also use this service to validate the QST registration number of a supplier outside Québec. Effective January 1, 2019, certain suppliers outside Québec must register for the QST and collect the tax on certain taxable supplies they make in Québec.
To check whether a GST/HST registration number is valid, use the GST/HST registry online service available on the Government of Canada website.
A business cannot claim input tax refunds (ITRs) on the purchase of property (corporeal or incorporeal) or a service from a supplier outside Québec that is registered for the QST (with a registration number beginning with “NR”), even if the property or service is acquired in the course of the business’s commercial activities. See the Input Tax Credits (ITCs) and Input Tax Refunds (ITRs) | Revenu Québec (revenuquebec.ca) page for more information.