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

Having trouble connecting to the support platform?
The Support Platform Help Centre contains a live chat that will allow you to chat with a real agent to resolve these technical issues. It also centralizes all the articles and videos you need to get the best out of the web ticketing system.
Important note:
The live chat staff will ONLY be able to assist you with login issues – any other request will need to be submitted via a support case, once the login issue has been resolved.

This week most consulted articles from our Knowledge Base

1. When will changes in the capital gains inclusion rate be updated in the program?
2. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
3. T3 RETURN PRINTS DO NOT SUBMIT : When can we electronically file a 2024 T3 return using version 2025 of the software?
4. When will the next version of Taxprep, Cantax, or iFirm Taxprep be released?
5. T1198 efile error - Efile Diagnostic #002025 or E779 - Line 68519 on the Form T1198 must equal to the sum of lines 68520 to 68560
6. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?
7. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform
8. CRA FORMS: Can I transmit slips and T5013 returns using the federal transmitter number MM for 2023 and prior years?
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. CRA ERROR code 95033
11. Cantax FormMaster FAQ - T3 EFILE transmissions – CRA EFILE error EF001141 when trying to electronically transmit T3 (trust) returns with Cantax FormMaster
12. How to add a licence or security role in CCH iFirm
13. Cantax FormMaster: Schedule 12: Minimum tax calculated for trusts not subject to minimum tax (ei. Graduated Rate Trust - GRE)