I can help you find the appropriate invoices to be paid in the new format, Kjenkyn.

Here's how to do it:

1. Click + Create in the top left corner.
2. Under Customers, select Receive Payment.
3. In the Customer field, select the customer whose invoice is being paid.
4. Enter the Payment date, Payment method, and Reference no. If applicable.
5. In the Deposit to field, select Undeposited Funds.
6. Enter the Amount Received that applies to this customer's invoice(s).
7. In the Outstanding Transactions section, check the box before the appropriate invoice(s) for this customer.
8. Enter the payment amount to split between the selected invoices.
9. Click Save and New.

Additionally, you can refer to this article for an overview of your customers' outstanding balances: Run an accounts receivable ageing report.

Feel free to reach out if you have any questions or need assistance with QuickBooks.