rjf7g wrote:
Go to http://store.apple.com/us on Safari, click on the gear and login to your account. You will be able to do it there.
Or just keep a couple I-tunes cards with you and use those if you don't want your credit card on file. If you use your cc and you have kids playing games on it go to general settings and turn off the "in app purchases" if that's on no password needed and your kids may be running up your card and not even know it. It happened to me for a few hundred bucks but apple waived all the fees cause my 9 year old and myself didn't know what was going on..... I do now and it's never happened again.