Guides
Short guides with sources. Each one links to the official pages and shows when it was last reviewed. General information only, not tax advice.
Québec NR QST system explained
What Revenu Québec describes as the specified QST system, and where its returns are filed.
Last reviewed: October 26, 2026
Quarterly deadlines
The quarterly due dates Revenu Québec and the CRA list for specified QST and simplified GST/HST returns.
Last reviewed: October 26, 2026