Q: How do I remove a card from the payment method?

Hello nidira,

It sounds like you are wanting to remove your payment info your account in the iTunes Store. This article should help you do that:

Change or remove your Apple ID payment information in the iTunes Store

If for some reason you cannot select None as your payment method, then this article may shed some light as to why not:

Why can’t I select None when I edit my Apple ID payment information?

Thank you for using Apple Support Communities.