How to use the balance on your apple account in app store? Recently I won a $10.00 gift card which I redeemed on Apple iTunes. So now when I open iTunes, to the left of my apple id, I see a $10.00 balance. My problem is that if I try to purchase an app, it asks me to enter my credit card information. 

On the form where I am supposed to fill my credit card information, there's a link which says to redeem your gift card click here. Unfortunately, if I try to enter the code of the gift (mentioned at the beginning of this post) it says that the gift card has been already redeemed.

I guess that means that the amount of the gift card has already been credited to my account (as it shows to the left of my apple id on the iTunes program). The question is: how do I spend this balance?
Just buy the app or the song or whatever and it will take from your balance first. I would check your settings to verify this, however.