I've got you covered in locating invoices and the associated payments in QuickBooks Online (QBO), @dobrian556.
Sales transactions are collated in one menu to track them in the application easily. With these, you can follow the steps below to locate invoices including their payments:
Go to the Sales menu and navigate to the Invoices tab.
From there, you can see all invoices created within the application.
To narrow down the results, we can filter the Status with these options; All, Needs attention, Unpaid, and Paid.
To check payments, tap the paid invoice to expand.
In the Invoice activity section, hit the payment link to see payment details.
That’s all! Furthermore, I have included a reference to a resource that provides comprehensive instructions for personalizing reports.