My account was Child. Now I’m over 18 (June 14, 2007) but still cannot use Family Sharing.บัญชีผมเคยเป็น Child แต่ตอนนี้อายุเกิน 18 แล้ว (14 มิ.ย. 2007) ยังสมัคร Family ไม่ได้ครับ
[Edited by Moderator]
Question marked as
Did already contact the organizer of the Family group?
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To change a birth date to any age below 13*, the account must be a member of a Family Sharing group, and the family organizer must approve the change. Follow the steps to change a birth date on the web. You can also create a new Apple Account for a child.
To change a birth date of any child account set to an age below 13*, you might have to wait for the account to naturally age up. If you see “your birth date cannot be changed to this date”, you can’t change to a birth date that would no longer be a child account.*
*Age varies by country or region.
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copied from: Update the birth date associated with your Apple Account - Apple Support