If you or a member of your Family Sharing group have a mobile device running iOS or iPad OS 13.4 or later, or a Mac running Catalina 10.15.4 or later, read this support article for instructions on what to do "If you forgot your Screen Time passcode". Click here --> https://support.apple.com/HT211021
If you still have issues resetting your Screen Time passcode, contact Apple Support.
https://support.apple.com/contact
Click on this link to read what to do "If you forgot your Apple ID 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 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
If you didn't receive your verification or reset email - Apple Support - https://support.apple.com/HT201455