Hi Clubdisk,
Thanks for reaching out to us with this query.
What you're searching for in QuickBooks Online powered by KeyPay is referred to as an Update Event.
An update event can be created and lodged to the ATO in the event that there have been changes made to one or more existing pay runs.
The update event will include all changes made to pay runs since the previous lodgment was sent.
You can find the steps involved in creating an update event, along with some other tips and important information here
Feel free to come back to this thread if you were in need of some more assistance with this.
Kristian.