I am trying to add on a card to my iTunes account but it doesn’t allow it

To add a card to your iTunes account, you can follow these steps:

1. Open the iTunes app on your device.
2. Click on the "Account" menu and select "View My Account."
3. Sign in to your Apple ID account.
4. Under the "Payment Information" section, click on "Add Payment
   Method."
5. Choose the type of card you want to add, such as a credit card or debit card.