Goods shipped to the US and most services for US clients are zero-rated at 0% GST/HST. Here are the CRA conditions, the exceptions and the proof to keep.

Zero-rated and exempt sales both have no GST/HST on the invoice. Only one lets you claim input tax credits. Here is how to tell them apart.

How the GST/HST Quick Method works in 2026: who can use it, the remittance rates, a worked Ontario example and when it is a bad fit.

How long to keep receipts for the CRA, what each receipt must show, scanning rules, and what to do if a receipt goes missing.

Input tax credits let a GST/HST registrant recover the tax paid on business purchases. What you can claim, what you cannot, and the receipts you need.