On occasions where a paid invoice has been included on a VAT return and cannot be voided or edited the best method to correct the invoice is to reverse the invoice. The steps below explain how to do so.
Head to Sales > Invoices and click on the Paid tab.
Click on the invoice number that needs reversing.
To create the reversal invoice, hit the Copy button.
Update the unit price so that the amount is changed to a negative value and then hit the Save button at the bottom of the invoice form.
Allocate payment using the quick pay form. This invoice and payment will cancel out the original.
Once the invoice has been reversed a new copy of an invoice can be created with the corrections and payments made as necessary.
Please note: Both the reverse invoice and the corrected invoice will need to be included in a future VAT return.