Basically, for GST registration, you apply to the Canada Revenue Agency for a GST Registration Number (also known as a Business Number), which you then use on all your invoices, in your accounting system, and in all your tax-related correspondence with the CRA.
GST registration is quick and easy; you can complete your GST registration online, over the phone by calling the Canada Revenue Agency at 1-800-959-5525, or by downloading RC1- Request for a Business Number, filling out the form and mailing it to the CRA.
Once your GST registration is complete, you'll be ready to collect and remit the GST (or HST).
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