How can I use my iTunes credit when part of Family Sharing?

Hi harifromshakopee,

Thanks for the question. Based on what you stated, it seems like you want to know how purchases are billed. I would recommend that you read this article, it may be able to help the issue.

How iTunes Store purchases are billed - Apple Support

How are Family Sharing purchases billed?

When you initiate a new purchase, it will be billed directly to the family organizer's account, unless you have gift or store credit. First, your store credit will be used to pay the partial or total bill. The remainder will bill to the family organizer. iTunes Store credit on your account isn't shared with other family members. So if the family organizer has a $50 credit on their account and another family member initiates a purchase, it won't deduct from the organizer's iTunes Store credit, but will bill the organizer's credit or debit card.

Thanks for using Apple Support Communities.

Cheers,

Mario