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Hot topics - Week of January 12, 2025
Known Issue: CRA 503 Error when attempting to file slips
An issue when attempting to file slips may result in a CRA "503 error". This is due to a URL change on the Canada Revenue Agency's (CRA) website. To fix the issue, please follow the instructions outlined in the following article: CRA ERROR CODE 503.0 - The Web address for Federal EFILE does not redirect to the appropriate CRA page
End of Phone Support: Benefit from our Advanced Virtual Agent 24/7!
As of January 1, 2025, the customer support teams will offer its 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.
New! 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 ERROR CODE 503.0 - The web address for Federal EFILE does not redirect to the appropriate CRA page
  2. FAQ FTF201410-009 – Slips – Identification numbers/CRA 2024/2025
  3. 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
  4. Form Transmission of Slip - The MM number is not accepted anymore. How to proceed?
  5. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
  6. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform
  7. I'm not able to transmit slips electronically for 2023 and prior years
  8. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?
  9. T4 Summary - Forms Program CPP2 (box 16A) is missing in version 2024 v1.0
  10. Forms - How to set up the information for Electronic Services - Identification
Date: 2024-Feb.-19
Personal Tax
Support Centre Open on Saturdays until the end of April


As your software partner, we know that tax season is a busy time for your business. For that reason, we have extended the working hours of our Support Centre, which will be open on Saturdays until the end of April.

Saturday support hours – 10:00 a.m. to 5:00 p.m. ET
From February 24, 2024, to April 27, 2024

We also continue to support you from Monday through Friday between 8:30 a.m. and 6:00 p.m. ET.

NEW: Please note that Saturday support service is only available through web tickets and live chats. Visit our Support Platform to consult our virtual assistant, submit your tickets, and chat live with an agent.

We would like to remind you that you can quickly obtain information by consulting the following resources:

  • the help topics accessible from your software program, which contain useful instructions on how your product works;

  • the Knowledge Base, which contains an array of articles answering technical and tax questions most frequently asked to Support Centre agents;

  • the Support Site, which gathers additional tools and resources allowing you to get further assistance.


As of December 1, 2023, emails are no longer monitored or answered

Email support service has been replaced with our new Support Ticketing system and chat feature to provide you with faster and more efficient service!

If you haven't already done so, register to our Support Platform to take advantage of the following benefits:

  • submit, modify and track all your support requests from a single online location;
  • connect to our virtual assistant who will suggest article that might answer your question right away;
  • create a support request through our virtual assistant who will offer you to chat live with a support agent!

Thank you for choosing Wolters Kluwer.