CA — Ontario (Default) CA — Atlantic (HST 15%) CA — Quebec (GST + QST) CA — British Columbia (GST 5%, PST per-product) CA — Prairies / Territories (GST 5% only) Export — United States (Zero-rated) Export — International (Zero-rated) Manually apply for non-CA / non-US customers. Auto-apply by country-group requires a custom rule. Tax Exempt (cert-holder) Apply manually to customers with a valid exemption certificate on file. Record certificate details in the partner notes.