how to change Apple ID? or add Apple ID for daughter?

LoriP.C Said:

"how to change Apple ID? or add Apple ID for daughter?: adding an Apple ID for my daughter.? separating the numbers on a same network."

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Set this Up Anew:

So, are you handing over your iPhone 7 Plus to her? If so, perform what is on this link: What to do Before you Sell, Give Away, or Trade in your iPhone, iPad, or iPod touch - Apple Support. Once all is performed, have her log in to it.

To change de address of an Apple ID see this Change your Apple ID - Apple Support (MY)

To add an Apple ID to your Family Sharing, see What is Family Sharing? - Apple Support and Set up Family Sharing - Apple Support