How do you take your credit card off your iTunes account?

How can i take off a credit card from my itunes account?

• I've done some research and people say there is a "none option" in the payment selection. I want to take off my credit card so that i can pay with my gift card. I already redeemed my gift card. The problem is that i cant see the none option in my payment information. Can someone help me? thank you.

• Answer:

  go into your itunes player, make it fullscreen. click on 'account' on the right hand side. in there you can erase your credit card. then you can redeem your gift card. some countries may not have the 'none' selection. skip it, just type in the giftc ard in the appropriate space.