Avionté does not currently support individual XML T4/T4A amended correction filings for electronic upload to the CRA.
A filed T4/T4A can be corrected manually with the CRA; visit this website: Amending, cancelling, adding, or replacing T4 slips - Canada.ca for more guidance.
If you need to make corrections and need to print the T4/T4A again, make those adjustments directly in Avionté.
For Example: Correcting SIN, Name, Date of Birth, etc.
You can then re-run the T4/T4A process and provide the new copy to your employee.
See the below articles for more details on this topic:
Note: CRA does not require Amendments for Address Changes.