How do I create a refund where a fee needs to be refunded to a client (QuickBooks Online)

In the below two scenario's, a customer has paid the surcharge / online processing fee which you need to refund.

Scenario

1. I created an invoice and accidentally charges a surcharge (online processing fee)
2. A customer is refusing to pay the surcharge (online processing fee)

Resolution

1. Log into IntegraPay and refund the surcharge amount (or manually process an eft payment)
2. Log into QuickBooks Online and create a credit note
3. Apply the credit note to the Wise-Pay clearing account, so that the refund balances the account
   
   

Additional Information

Applying a credit memo, credit or refund a customer: https://community.intuit.com/articles/1145640-applying-a-credit-memo-credit-or-refund-for-a-customer    

1. Select the plus icon (+) at the top > refund receipt (if you don't see that, click show more)
2. Complete the fields as follows:
   Customer: from the drop-down list select the customer the refund is for
   Date: change if necessary
   Amount, Payment Method & Ref: fields are to be left blank
   Memo: optional
   Deposit to: leave blank since money isn't actually being deposited with this transaction
3. On the left under credits > click on the plus sign (+) next to total credits (this will allow you to view more details about credits)
4. Make sure the credit or unapplied payment you want to check/cheque or cash entry linked to is checked and ensure that the amount is correct (check the boxes next to the refund or the customer credit)
5. Click save.