After you have created/received a Return or RMA from a Customer, the next step is refunding their payment. If they paid via invoice, cash, or check, you can manually refund them in cash or by issuing a credit memo.
If they paid with a credit card or PayPal via Cohub, you can easily issue them a refund right from the Sales Order. Go to the order page and from the "Transactions" section towards the bottom, you will see a "Refund" button next to any applicable charges. Click this and the refund modal will appear. Enter the correct dollar amount and click refund, and the amount will be automatically be sent back to their original method of payment.
After the refund is issued, you will be able to see it in the history of the transactions table on the Sales Order.