4a. To update your credit card information, first click the "Credit card number" field. Then enter your desired card number, the three-digit security code on the back of the card, and the expiration date:
4b. To update your shipping address, click into the address fields and make the necessary changes:
4c. To update your billing address, click into the address fields and make the necessary changes.
NOTE: If necessary, first un-check the box at the end of the "Shipping" column:
5. Confirm your changes by clicking the blue "Save Changes" button:
6. You will see a green checkmark next to a message at the top of the screen confirming that the changes to your order were successfully saved.