Q: I cant get my daughter added to my family sharing

Hello GHOSTFAIL,

Welcome to the Apple Support Communities!

I understand that you are having an issue setting up Family Sharing with your daughter. To begin troubleshooting, I would suggest reading over the two attached articles below. 

Family Sharing and Apple IDs for kids - Apple Support

Family Sharing - Apple Support

If your issue continues, please elaborate on the specific nature of your situation. 

Have a great day,

Joe