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Hot topics - Week of July 6, 2025
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:
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)
Date: 2023-May-8
Customer Service and Support Centre
2023 Summer Hours


For the summer season, we would like to inform you of changes to Customer Service and the Support Centre hours, as well as the closing days of services during the statutory holidays of summer 2023.

Summer hours:

From May 8, 2023, to September 1, 2023, summer hours are:

  • Monday through Friday
  • 8:30 a.m. to 6:00 p.m. (ET)

Closing days – statutory holidays:

  • Monday, May 22, 2023: Closed
  • Monday, July 3, 2023: Closed
  • Monday, September 4, 2023: Closed

Please see the Contact Us section of our Web site for more details on our schedules.


Consult our Knowledge Base to quickly find the information you need!

Available from our Support Web site, our Knowledge Base contains an array of articles answering technical and tax questions most frequently asked to Support Centre agents. All you need to do is enter a few key words and the articles display in order of relevance to provide you with valuable information that will accurately answer your questions.


Our customer support centres are going digital: emails are now our first priority

As part of our transformation to digital support centres, we are pleased to announce that email inquiries will now be given first priority. This digital shift will allow us to process your requests even faster, and better meet your needs.

From now on, use emails instead of telephone to contact Customer Service and the Support Centre by including your account number and the name of your product in the subject line as well as detailed information in your email (form/line/diagnostic number, print screens, etc.) to get accelerated service!


We thank you for your continued support and wish you an excellent summer season.

Wolters Kluwer Canada