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

Tis week most consulted articles from our Knowledge Base

1. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
2. CRA FORMS: Can I transmit slips and T5013 returns using the federal transmitter number MM for 2023 and prior years?
3. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform"
4. How to clear browser cache in Chrome or Edge
5. iFirm User Has No Access to Tax Products
6. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?
7. How do I prepare an amended federal T1 return to transmit it electronically (EFILE)?
8. "Cannot continue the operation because the location of the transmission database is not available or is not specified correctly"
9. Forms - CRA Efile error - Account number given in the attached T619 electronic transmittal records does not match the account number you used to sign in
10. FAQ – FT12024-001 – Decommission of the CRA’s authorization service in EFILE software for individuals (T1)