Hello there, Luz. Once you’ve submitted your T4s, they can't be deleted. Instead, you'll need to file amended slips to fix errors or cancelled slips to remove them entirely.
To start, you can provide more details about the exact error message or a screenshot. It will help us better understand what's happening on your end and allow us to deliver an effective resolution.
In the meantime, you can check these CRA pages for guidance on how to amend or cancel your T4s:
If you have questions, don't hesitate to reply. We’re here to help.
