Welcome to the Community space, @blcl.
I understand how vital it is for you to operate your business seamlessly using QuickBooks Online. I'm here to assist you with your queries and to offer further clarification. To help you effectively, could you please provide more specific details about your concern?
Can you clarify what you mean by collecting a third-party rebate? Additionally, it appears you started to outline some steps but didn't complete them. Could you please provide more details? Your cooperation is highly valued and will help us find a solution.
If you need to share a screenshot, please ensure that it does not contain any sensitive information to avoid any potentially fraudulent activities.
Additionally, you can check out this article to help you learn how to record a refund or credit from a vendor in QuickBooks Online that you can use in the future: Enter vendor credits and refunds in QuickBooks Online.
Furthermore, with apps integrated into QuickBooks, you can easily connect QuickBooks Online to data import/export applications, allowing you to quickly import and export data in seconds. Explore popular integrated apps.
The Community is always here if you need an extra pair of hands in any QuickBooks-related matters you may acquire. Stay safe!
