Making a Parent for a Child Account

I have a Regular account and a Child account on the xbox one, but for some reason, I cannot add the child account as a family member to the regular account or make the regular account the parent of the child account. It does not appear in the normal "Add
to family" menu and I tried forcibly adding the account by putting in the email and password for the child account, but the console just says that "Another user on this device uses this Microsoft account, so you can't add it here." Where would I have to go
in order to add the child account to the family? Or, where would I need to go in order to make myself a parent to the child account?

:)

 

CC use

If he has a child account and you are the parent account you should be able to set up a passcode on your console that will require you to enter it in before making purchases. Otherwise, you may want to switch to prepaid cards, and never give your child
the password to your Microsoft account if you are the parent.

 

New to Xbox, question about gold

So new to Xbox one and got my son one for Xmas. Have two accounts (a parent and child account) setup. If I purchase a gold membership for the parent account does the child account get to use it too? Does the parent account have to be signed in for the
child account to use it? Seems like the digital content we purchased requires the parent account to remain logged in for the child account to play them, wasn't sure if this worked same way. Thanks