For Canadian domestic shipments, the HST or the GST (whichever applies) will automatically be included in the shipping price shown.
International shipments are exempt from HST or GST. They can however be subject to duties and local destination taxes. These charges are assessed by the local government and are paid by the recipient of the shipment. Our system is not able to predict how much the recipient may be charged for duties, taxes, or any other landed costs. One way to find out is by contacting a licensed customs broker at the destination country.