How do I mark an invoice as paid in QuickBooks?

To mark that payment as paid:

• Go to that customer in QuickBooks support.
• Open the invoice.
• Click the button to apply for a credit.
• The Journal entry will appear and you can apply that to the invoice.

Receipt (statement) for a single customer:

• Choose Customers and then Customer Center.
• Click the customer name on the scrollable list at the left.
• On the upper-right of the table, click on the New Transaction drop-down arrow and select Statement.
• Click to select Balance Forward or Open Item.

Please perform steps only when you are sure that the invoice is already paid.