Edit transaction statuses
Here's a simple tip to show you how to edit the status of a transaction. You can change it to voided, refunded, completed, etc.
Click into the Transactions area of your account. Here all the transactions will be listed starting with the most recent one and so on down to the first one ever. You can search for a specific transaction by clicking Search. You can narrow it down to a specific campaign, key words, date, or transaction status. Once you've found the transaction that you want to edit, click Edit next to it. Here you can click the option that says Edit Transaction and change it's status.
Note: Editing the Transaction Status doesn't actually Void or Refund the transaction. You will literally need to go and Refund or Void the transaction, etc.