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Hot topics - Week of April 13, 2025
NEW: Beginning March 24, 2025, the CRA will no longer accept direct deposit updates or changes submitted via EFILE
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This week most consulted articles from our Knowledge Base
  1. How do I register for the ''support.cch.com/oss/canada'' Support Platform?
  2. Cannot log in to the ''support.cch.com/oss/canada'' Support Platform
  3. CCH iFirm Tax: How to send a return to Support
  4. How do I attach files to my case on the ''support.cch.com/oss/canada'' Support Platform?
  5. How do I reset my password on the ''support.cch.com/oss/canada'' Support Platform?
  6. The federal T1 return is rejected by the CRA with error code 43 in Taxprep or CCH iFirm Taxprep T1
  7. CRA FORMS: Can I transmit slips and T5013 returns using the federal transmitter number MM for 2023 and prior years?
  8. 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
  9. How to resolve the capital gain diagnostics E780, E1546 and E1547 concerning the periods when the slips do not provide the details?
  10. Form T1198 Efile Diagnostic error #002025 (Cantax) or E779 (Taxprep-CCH Ifirm Taxprep)

Products Support

Knowledge Base Video Library My support cases Latest News System Requirements
Date: 2023-Dec.-20
Cantax T1Plus
System Requirements

To correctly execute the latest version of Cantax T1, your computer system must have the following:

Processor

Dual Core processor (Quad Core processor is recommended)

Supported operating systems
  • Windows 10 (32-bit and 64-bit) except for Education and Home Editions*
  • Windows 11 (64-bit) except for Education and Home Editions*
  • Windows Server 2016
  • Windows Server 2019
  • Windows Server 2022
* For more information on the different Windows Editions, and their respective minimum requirements, consult the Microsoft Web site:
Note: RAM requirements are highly dependent on the operating system used. Please refer to the documentation provided with your operating system for minimum and recommended RAM requirements.
Important: We are strongly recommending that all customers enable the enhanced security measures available in Windows 10 or higher operating system, including SMB 3.0 encryption for data in transit. Since the configuration of SMB 3.0 is explicit, please consult this Microsoft article to proceed with its configuration.
Microsoft .Net Framework

Microsoft .Net Framework v.4.8.0 or higher is required.

Network File Systems
  • NTFS
  • FAT32
  • exFAT
PDF Printer

Cantax is compatible with the Amyuni PDF Document Converter 6.5.

Internet Connection
  • An Internet connection is required to use electronic services available with Cantax.
  • The TLS 1.2 protocol must be enabled in the Microsoft Edge browser settings.
Browser configuration required to use the Download CRA Tax Data service

If you can access the CRA’s Represent a Client service with your Web browser, your configuration should normally allow you to use the Download CRA Tax Data functionality.

The recommended configuration for Microsoft Edge is as follows:

  • the defined Internet security level is the default level;
  • the TLS 1.2 protocol is used;
  • the cookies are enabled; and
  • the JavaScript function is enabled.

If the above is not complied with, you might be unable to access the CRA log in services.
The CRA Represent a Client service uses persistent cookies. These persistent cookies will not log nominative data.