Good afternoon, rouleztransporta.
Thanks for bringing your question forward here in the Community. I want to make sure you're able to reflect the correct amounts in your QuickBooks Online account.
One potential option to show the difference is to write off "bad debt." Technically, recording the difference as bad debt means the customer owes you money, but you can't collect it. In this instance, the purpose of this entry is solely to record the differing payment amount. This article provides additional info on the process: Write off bad debt in QuickBooks Online
With that being said, I suggest speaking with your accountant or bookkeeper to verify the best entry. They'll be able to show you exactly where to make adjustments based on your business setup.
If you need additional assistance afterward, please don't hesitate to reach back out. Take care!