We're glad you asked!
To update your payment info, please log in at http://vegancuts.com/login. Select “My Account” in the top right corner. You'll see “Manage Credit Card” as an option at the bottom of the drop down menu. Once you're on the “Manage Credit Card” page, you can update your information.
Please remember to click "Update" or all of your changes will be lost. Let us know if you run into any trouble!