Hey there! If you're looking to add another Capital One credit card to use with Eno, you should be able to click on Eno's icon and then click on your profile pic to choose the default card. You'll need to make sure the card has already been added to your online profile before you're able to begin using it. If thats not working, give us a call at 866-750-0873 and we can assist further there. Thank you!