This should be simple but it appears not to be. How do you update credit card information?

To update your TurboTax (non-Advantage) account email, phone number, mailing address, or password:

1. Sign in to TurboTax and select Intuit Account on the left, just above Sign Out (you may need to scroll down; select the 3 white lines or Tax Home if you still don't see this).
2. Select Edit next to the information you want to change.

To update your TurboTax Advantage account, see these instructions.

The original post can be found here. 

I have gone in 2 times to change it and the next time I go in it is the same old number??

dlw.