Chat with our virtual assistant
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: 2024-Nov.-12
Microsoft .net 8.0 required for the next Taxprep releases

Dear Taxprep customers,

In order to ensure a smooth installation of the upcoming Taxprep product versions, the Microsoft .net 8.0 software environment must be installed on your computer prior to the installation of Taxprep products.

If Microsoft .net 8.0 has not been installed, the following error message will appear when installing Taxprep and will prevent you from completing the installation of the tax program:



To avoid complications during the installation process of Taxprep, please make sure that Microsoft .net 8.0 (Microsoft Windows Desktop Runtime - 8.0.x (x64)) is installed on your computer.

If you notice that Microsoft .net 8.0 is not installed, please consult the procedure described in the article How do I install Microsoft .net 8.0.0 or a higher version (Microsoft Windows Desktop Runtime - 8.0.x (x64)) available in our knowledge base.


Register to the Wolters Kluwer Support Platform

Register to our support platform to submit, modify and track all your support requests in a single location. A chatbot system and a live chat feature powered by our virtual assistant are also included, with access to over 40,000 articles from our knowledge base. Note that since December 1, 2023, the Support Centre no longer offers an email support service, which has been replaced by our new support ticketing system.

If you need help during the registration process, please consult the following article to get all the information you need: How do I register to the new Support Platform?  

For more details about the web ticketing system and best practices, watch the following “How to” videos:


Register now to our Support Platform and take advantage of all the benefits it has to offer!

To consult our customer service schedule and learn more about how to contact us, please visit our corporate Web site.

Wolters Kluwer Canada