Canada QST Validator
Validate Canada QST
Enter a Canadian Quebec Service Tax Number to verify its validity.
About this Validator
This tool validates Quebec Sales Tax (QST/TVQ) registration numbers according to Revenu Québec's format requirements.
The validator checks if a given QST number follows the correct structure, combining business identification, program identifier, and serial number.
This validation only confirms if a QST number follows the correct format. It does not verify if the number is actually registered with Revenu Québec.
What is a Quebec Sales Tax (QST) Number?
QST Number Structure (16 characters): • First 10 digits: Business identification number • Next 2 letters: Program identifier (TQ/QT) • Last 4 digits: Serial number • Format: XXXXXXXXXX TQ XXXX
Registration Details: • Required for Quebec businesses collecting QST • Separate from GST/HST registration • Province-specific identifier • Used for Quebec tax purposes
Used for: • Quebec sales tax collection • Provincial tax reporting • Business documentation • Tax compliance in Quebec
If you need to generate a QST number for testing purposes, here is a Quebec QST Number Generator