End of Phone Support: Benefit from our Advanced Virtual Agent 24/7!
Since January 1, 2025, the customer support teams offers its high-quality service exclusively through digital channels, and no longer offers incoming phone support. Click here for more details on this matter.
Register for our support platform and log in to our virtual agent to find answers, submit a support ticket or chat with a live agent.

Watch videos to find out everything you need to know about the support platform:

• How to Register With the Support Platform to Begin
• How to Open a Support Case or chat with a live agent
• How to Manage Your Support Cases: what happens after you submit a support case?
• How to Reset Your Support Platform Password

This week most consulted articles from our Knowledge Base

1. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform
2. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
3. The CO-17 return is rejected with error code 13966 - Unauthorized user.
4. How do I reset my password for CCH iFirm?
5. CRA FORMS: Can I transmit slips and T5013 returns using the federal transmitter number MM for 2023 and prior years?