Chartered Professional Accountants Canada: http://cpacanada.ca/
Chartered Professional Accountants of Ontario: http://cpaontario.ca
Canada Revenue Agency: http://www.cra-arc.gc.ca/
Ontario Ministry of Finance Tax Revenue Division:http://www.rev.gov.on.ca/en/index.html
Service Ontario – Services for Business:
http://www.ontario.ca/en/services_for_business/