Step1. Find your user name and password.
After you created the label successfully, you will receive an email with your user name and password at the email address you entered when creating the label.
Step2. Log in your Circle.us account and you can void the label in “Shipments”.
Then the shipping cost will be refunded to your Circle.us account instantly. You can check your balance in “Finance”.
Please be advised that you can just use the credits in your Circle.us account to create another label. Please refer to this link for instructions: