Refund of the Ontario Provincial Tax on personal purchases of Gasoline Fuel and Diesel https://www.international.gc.ca/protocol-protocole/policies-politiques/gasoline_ontario_provincial_tax_refund.aspx?lang=eng
The Ontario Provincial Legislation, namely the Gasoline Tax Act, provides an exemption of the provincial tax on gasoline and diesel fuel to certain categories of accredited foreign representatives. The Ministry of Revenue, which administers the Gasoline Tax Act, is responsible for processing refund applications.
and return it to the Ministry of Revenue at the adress below: Ministry of Revenue Motor