If you have an Advantage account, in Step 4 of the FAQ linked above there are 2 methods to delete the CC information.
If you need additional help, you can phone Customer Support on Monday at the special Advantage phone number. If you are an Advantage member (annual subscription), log into your Advantage account and scroll down past the FAQ links. Near the bottom of the page you should find a special Advantage phone number to directly contact Customer Support.
If you are not an Advantage member or don't see the special phone number in your Advantage account, use the form at the link below to schedule a call back, or it may provide a number. Hours are 5AM-5PM Pacific (8AM-8PM Eastern) Monday-Friday.
https://support.turbotax.intuit.com/contact
Or phone general Customer Support on Monday at (800) 446-8848.
