How do I ammend a T4

Hi there user40391,

It's crucial that the T4 slips you prepare accurately reflect the data that you've entered into the QuickBooks Online Payroll module. This ensure accurate reporting when it comes time to submit to the CRA. The QuickBooks Online Payroll module generates your T4 slips by pulling data that you've entered while running payroll, so let me explore how you can make an amendment.

Since the data that makes up your T4s is pulled from what you've entered into the system, it's assumed to be correct. However, from time to time it's essential to make adjustments. You won't be able to make these adjustments yourself within QuickBooks Online, but what you can do is reach out to our team of support experts in order to have them help you with the task. They'll collect some sensitive account details, send you a form to complete, and once they receive it back from you, they'll send it off to the appropriate team to have the changes implemented.

If you'd like to reach out to get this sorted, here's how you can contact us:

Phone: Call us at 1-855-253-1536 from Monday to Friday between the hours of 9 AM and 8 PM EST.
Schedule a Callback or start a Chat: click (?)Help in the upper right > type and enter "Contact support" into the QB Assistant > click Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat. 
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Feel free to submit Feedback on this through the Gear icon in order to express to our product developers how ammendable T4s would make things easier for you and your business. They love to implement new features and improve existing ones to meet the needs of users like you.

Take care and let me know if there's more I can do to support you now or in the future.