Hi, i would like to know how can i delete my iTunes account 'cause i've searched this information all over the iTunes Online Support but i wasn't able to find it...thanks
You can't delete your iTunes Music Store account if it has been created as you may need it in future to authorize new computers to play your purchases.
As Kay notes, you can't delete it. Just go to Store > View My Account and make sure it doesn't have your credit card details, and then forget about it.
ed2345 is correct - you can log into your account and set the credit card back to none. You just press the " *edit payment information* " button, then click on the radio button for None.
Mine shows +Payment Information: No credit card on file.+