Institute of Chartered Accountants of Ontario

Chartered Accountants of Canada

WSIB
System Overview for Employers (PDF)

Canada Revenue Agency
Tax Rates
Get a Business Number
Tax Topics for Businesses
Tax Topics for Individuals
Forms and Publications
Payroll Information

Ontario Ministry of Labour
Employment Standards

Ontario Companies Branch
Services for Business Registration

Ministry of Finance
Services for Business (Taxes)  

Bank of Canada
Currency Exchange Rates