A Credit Note can be used to reverse an invoice on an account.
Select the required Customer, Business or Third Party, then click [Credit Note].
This will open the Credit Note Screen:
Double Click on the Item which needs to be credited.
This will add the item to the credit note, where you can add a [Reason]:
When you have finished, click [Account] to post the Credit Note to the Customer Account.
Clicking on [Print Credit Note] will post the Credit to the account, and open the Credit Note in the Document Viewer.