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Amending Tax Slips

This is last year's information, but your 2021 tax slips will follow a similar process. Check back in January for more info!

Did you find errors in your employee’s tax slips after you submitting to the CRA or MRQ? Please create an amended file, unless a cancelled file must be created per CRA or MRQ. To cancel your tax slips, go to Cancelled T4/T4A or Cancelled RL1/RL2 for more information.

This article will guide you through four steps to create amended slips:

  • Update employee tax slips

  • Validate tax slips

  • Generate tax slip file

  • Save tax slip images

Once you’re done creating the amended tax slips, you can view, print, and email them.

Additional Information
If you’re amending for a Relevé and need to re-extract your employees' tax slips, please contact Client Care for assistance.

How to Update Employee Tax Slips

To start, you need to make the adjustments to your employee’s tax slips.

Step 1: Open Modify Employee Tax Slip Data in the Avanti Desktop Application.
By default, this can be found in Canadian Payroll >> Tax Slip Processing.

Step 2: Select 2020 for Tax Year.

Step 3: Select the Tax Slip Group.

Step 4: Select the employee who requires an amended slip, then select Modify.

Step 5: Navigate to the correct tab and update the tax slip information for your employee.

Additional Information
Are you looking for more information on how to update the tax slips? Go to Review, Modify, and Add Employee Tax Slips for details. If you’re still unsure of how to make adjustments, we’re happy to help! Get in touch with us at for additional assistance.

A record of the changes can be found on the Change Log tab, which can be printed.

Step 6: Select OK to save your changes.

Important Information
Make a note of the day and time you start making these adjustments. This will come in handy when you recreate employee tax slips and files to submit to the CRA or MRQ. 

Step 7: Repeat Steps 4-6 for each employee you need to create an amended tax slip for in the tax slip group.

Step 8: Once you are finished making changes in this tax slip group, select Print Change Log. From here, you can save a copy of the changes for your records and the audit trail.

Step 9: Repeat Steps 3 to 8 for each tax slip group that needs an amended tax slip.

How to Validate the Tax Slip

Validate the tax slip groups with updated tax slips before creating your employees' amended tax slips or the CRA or MRQ transmission file.

If you need additional details on validating, go to Validate Your Tax Slips

Step 1: Open Validate Tax Slip Data in the Avanti Desktop Application.
By default, this can be found in Canadian Payroll >> Tax Slip Processing.