There are two-ways on how we can record those customer's payments, phoenixpetsuppli.
We can create either an invoice or we can directly issue a sales receipt.
Here's how you can do it:
In case you're ready to reconcile the transactions, you can check this article: Reconcile An Account in QuickBooks Online.
Don't hesitate to get back to me if there's anything that I can help you with.Stay safe!