Can't get one child to join Apple music family subscription

Hi Yesyesok,

Thanks for using Apple Support Communities. It sounds like you’re having trouble adding a child account to a Family Music subscription. I’m happy to help. To start, I suggest making sure you’ve tried the steps below:

Family Sharing and Apple ID for your child - Apple Support

Then, you’ll want to make sure you’re following the steps for joining an Apple Music Family Subscription:

Get an Apple Music Family subscription - Apple Support

Let me know if that helps.

Take care.

Yesyesok,

Thanks for the additional information. If you believe there’s currently an Apple Music trial active on that account, you can cancel it using the steps below before trying to add it to the Apple Music Family Subscription:

View, change, or cancel your subscriptions - Apple Support

Should the issue persist, you’ll want to reach out to iTunes Store Support for further assistance:

iTunes - Contact Us - Apple Support

Cheers.