In order to check if you have your card details saved on file, please login to your my.Tsohost.com account and navigate to the 'Billing' section. Here you will see your existing card details saved, if you do not see your credit card as listed, enter your new card information by clicking on 'Add/Update a credit card'. Please note, if you already have a card associated with your account, completing this form will overwrite those details.