Once you delete the refund, use the credit note to pay another invoice.

1. From Banking, open the relevant bank account.
2. Search for the refund in the Activity tab.
   
   TIP:

   Use the From and To boxes to adjust the date range. Select More and under Type choose the relevant transaction type.

3. Select the check box next to the transaction you want to delete and select the Delete icon.
4. Select Yes.

Now you've delete the refund. You can match the credit note to the correct invoice.