Did you receive an error when updating your new card details?
If not, we can try some basic browser troubleshooting. Let's start by logging in to QuickBooks in a private window and updating your card. While your computer stores copies of frequently accessed pages in its memory cache, a private browser is a good place to start the troubleshooting. Since it doesn't store any cache. which may be the cause why you're unable to update your credit card information.