I'm here to help you enter a missed payment in QuickBooks Desktop, @BellaMiaSalon.
You can enter a missed payment the same as how you receive payments for an invoice in QuickBooks Desktop if you're June books are still unreconciled. Let me show you how:
From the QuickBooks Home page or the Customers menu, choose Receive Payment.
In the Received From drop-down, click the customer's name.
Input the Amount received.
Make sure the date is correct, then select the Payment method.
Choose the invoice or invoices you'd like to pay.
To add a discount or credit, select Discounts and Credits.
Click Save & Close.
If you're about to pay vendor payment, then you can utilize this reference for detailed steps: Pay bills in QuickBooks Desktop.
Feel free to leave a comment below if you have other questions about entering missed payment for June. I'll be happy to help you always. Stay safe and take care!