breaking up iTunes account
my daughter has been on my iTunes account for years and our music libraries are intermixed. Can she create her own account and separate herself from my account without losing all her music?
Question marked as
Yes she can (and should) get her own Apple ID, as all settings relating to Apple ID are individual by design. Depending on her age, that may require adult consent/supervision.
Family Sharing and Apple ID for your child - Apple Support
Family Sharing - Apple Support
Set up Family Sharing - Apple Support
Get an Apple Music Family subscription - Apple Support
Help your child set up an iPhone, iPad, or iPod touch - Apple Support
Request and make purchases with Ask to Buy - Apple Support
Get help using Ask to Buy - Apple Support
Keeping all her music isn’t automatic. She could manually add it again, or have you share that selection through one or more playlists. Create and share playlists - Apple Support