If you're referring to Apple ID balance the only way to use it is to spend it. If you redeemed gift cards to build this balance you can get small amounts refunded to you if laws for where you live allow it.
Check your Apple ID balance - https://support.apple.com/HT202359 -->
"About unused Apple ID balance
You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards, or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows for refund of redeemed gift balances, you can contact Apple Support [ https://support.apple.com/contact ] to request a refund. When you contact Apple, please include the following information:
Your Apple ID.
The refund amount.
Your current shipping address."