If you have incorrectly applied a payment to an Invoice, you may reverse it by deleting the receipt linked to the Invoice.
Open the Matter where the invoice is linked.
Go to the Receipts tab inside the matter and tick the box beside the receipt number of the payment that you would like to reverse and click the Delete button.
Payment will then be reversed and you can reapply the payment accordingly.
Please note:
You may also search for the receipt directly in the Receipts page. Just type the Receipt number on the search box.