IO have same need...my email got hacked which is my icloud id and I need to change it. I changed it on all ios devices and in itunes but when i go to icloud on my imac there is no way to get rid of it. This seems just wrong. Can I delete icloud from my imac and then reload it?
Click the apple >> system preferences >> iCloud >> sign out. Then sign back in with the desired apple id. Some data will be removed when you sign out. You can export data you want to keep first, sign out, then reimport. If it's just your daughter's info, then this probably won't matter to you.