Introducing Ontario's new online tax service, ONT-TAXS online
Secure, convenient and free online access to your business tax account(s) 24 hours a day, seven days a week.
If you are starting a small business - or are already in business - this section of the site will help you find the information you need to understand how Ontario business taxes apply to you.
Choose from the links below for details about your role with the Ministry of Revenue from registering right through to closing your business.
- Business Start-up and Registration
- Reporting and Remitting
- Address Changes
- Amalgamations and Ownership Changes
- Audit Information
- Objections and Appeals
- Closing your Business
Events
Forms, Publications and Templates
- Business Plans
- Forms and Publications by Topic
- Guide for Canadian Small Business
- Ontario Business Program Guide
- Small Business Guide
- Small Business Pointers relating to Retail Sales Tax
Programs of Interest
Points of Reference
- Canada-Ontario Business Service Centre
- Ministry of Economic Development and Trade
- ServiceOntario Services for Business
- Small Business Research and Policy
- Small Business Tax Administration Advisory Committee
The Small Business Tax Administration Advisory Committee members represent small business owners in Ontario who work together with ministry representatives to improve the tax administration processes in Ontario.