Canada Revenue Agency (CRA)
T.I.P.S. (Tax Information Phone Service) 1-800-267-6999
Individual income tax enquiries 1-800-959-8281
Income tax refund enquiries 1-800-959-1956
Information and services for businesses
and self-employed individuals 1-800-959-5525
GST/HST credit 1-800-959-1953
For a full list of contact information see:
http://www.cra-arc.gc.ca/contact/menu-e.html
Canada Revenue Agency Home Page
http://www.cra-arc.gc.ca/
CRA Online Course – Learning About Taxes
http://www.cra-arc.gc.ca/tax/individuals/topics/learn-tax/menu-e.html
Canada Income Tax
http://www.cra-arc.gc.ca/tax/individuals/menu-e.html
1-800-959-8281
Business Taxation
http://www.cra-arc.gc.ca/tax/business/menu-e.html
1-800-959-5525
Goods and Services Tax / Harmonize Sales Tax (GST/HST)
http://www.cra-arc.gc.ca/tax/business/topics/gsthst/menu-e.html
1-800-959-1953
Other (Non-resident, Charities, Non-Profits, Trusts, etc.)
http://www.cra-arc.gc.ca/tax/menu-e.html