End of Phone Support: Benefit from our Advanced Virtual Agent 24/7!
As of January 1, 2025, the customer support teams will offer their high-quality service exclusively through digital channels, and will no longer offer incoming phone support. See the communication sent on this matter for further details.
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.

Support Platform Help Centre
Having trouble registering or logging in to the 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. CRA Efile error - account number given in the attached T619 electronic transmittal records does not match the account number you used to sign in
2. What identification numbers do I need to be able to file slips or a T5013 return electronically, and how do I set the options in the program?
3. Form CRA Efile error - Invalid formatting detected in one or more field
4. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
5. When will the next version of Taxprep, Cantax, or iFirm Taxprep be released?
6. CRA ERROR CODE 503.0 - The web address for Federal EFILE does not redirect to the appropriate CRA page
7. CRA FORMS: Can I transmit slips and T5013 returns using the federal transmitter number MM for 2023 and prior years?
8. CRA ERROR T5 slip "Filer account number is missing or invalid for this type of return"
9. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform
10. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?