Q: I am not able to use my itunes gift card after inputting card

Hello, tdrisk1. 

Thank you for visiting Apple Support Communities. 

Here is some information that you may find helpful regarding redeeming gift cards in iTunes. 

If you have a billing or purchase question, see what to do:

• You might not be able to use your credit if you see a message that your credit is temporarily unavailable. You can try again later.
• You can use store credit to purchase items until the credit is gone. See how much credit you have left.
• Your iTunes account can have gift certificates, prepaid cards, allowance credits, and free song credits at the same time. Learn how your purchases are billed.
• You need a credit card to purchase an iTunes Gift online.

Redeeming iTunes Gift Cards and content codes

http://support.apple.com/kb/ht1574

Cheers,

Jason H.