To remove a payment method from the app, go to the Payment Method section in the Benefit app. Swipe the payment method you would like to remove to the left. (Press and hold it, then swipe left). A red "archive" button will appear. Click on it. This will archive any transactions you have on file and the payment method will be deleted. If you ever want to use that payment method again, you will have to re-enter it and start fresh.