Q: How do I log in to my iTunes to see how much I have left on a gift card?

Hi Jennifer9494,

Once you redeem an iTunes card, the credit from the card is added to the total available account credit amount, as detailed in the following article:

iTunes Store: How to redeem a code

http://support.apple.com/kb/HT1574

8. Once you've successfully redeemed your code, the credit amount will appear next to your account name in the upper-right corner. Each time you purchase items, iTunes will deduct funds from the credit until it's depleted. If a pending purchase exceeds the credit amount, iTunes will ask you to enter a credit card number. You do not need to re-enter your gift card number to make multiple purchases.

Cheers,

- Brenden