I am the person that will be helping you today.
I have given you the requested instructions below.
If you are updating the information on your computer, follow the instructions below:- Open iTunes
- Click "Sign in" and enter your Apple ID & Password.
- Click your name and select "Account Info" from the menu.
- Click the Edit link next to your card listing.
- Make the changes you wish to and click Done.
If you are using your iPhone or iPad, do the following:- From the Home screen, tap Settings > App and iTunes Stores > Apple ID.
- Tap Payment Information. Make the changes you wish to to your credit card on file and tap "Done".
I look forward to your next message below or your rating on the top of this page (choosing of number of Stars and clicking the Submit button)
Please, do not forget to rate my help on this page.
Thank you again, - Jason