My best guess, cause i steal music illegaly :O NAWWT, go to itunes, make sure you are signed in then go to itunes store home page, and the very first Panel on the top right side has a bunch of options like browse, power search, account, redeem... etc. anyways you want to click on redeem, then the back of your itunes gift card should have a redeem code on it, enter the code in the space provided. hope this helps.