Reset apple id password for my child

Is your daughter 13 years or older? For all I know she could be 50 years old. ;-)

If she has an adult 13+ account then it has to be done from her account:

Click on this link to read what to do "If you forgot your Apple ID [Account] password" --> https://support.apple.com/HT201487

or go directly to this link --> http://iforgot.apple.com/

Also read about "What to do after [or before] you change your Apple ID email address or password" --> https://support.apple.com/HT204071

If you didn't receive your verification or reset email click here --> https://support.apple.com/HT201455

If you are being sent a verification code to a phone number to which you no longer have access, click on the next link to see the various ways of getting a verification code and what to do if you cannot get one:

Get a verification code and sign in with two-factor authentication --> https://support.apple.com/HT204974 and a related new feature: Account Recovery Contact --> https://support.apple.com/HT212513

If you still need help:

Contact Apple for help with Apple ID account security "This article provides country-specific Apple Support contact information for customers seeking help with their Apple ID password or other security-related issues." --> https://support.apple.com/HT204169

From:

Create an Apple ID for your child - https://support.apple.com/HT201084

- "Your email address is the rescue email address for your child’s account, and you can use it with the security questions you provided to reset a forgotten password. You can keep your your child's account more secure with two-factor authentication."

- "If you need to see the options you have for managing your child's account, you can sign in with their Apple ID and password at https://privacy.apple.com/account."

If this is a child's account you use your password to reset her password.

Contact Apple for help with Apple ID account security - https://support.apple.com/HT204169 "This article provides country-specific Apple Support contact information for customers seeking help with their Apple ID password or other security-related issues."