To reset your forgotten Apple ID password, start by visiting the
iforgot.apple.com website at appleid.apple.com. Click on "Forgot Apple ID or password?" and enter your Apple ID. You'll then need to choose one of the available options to reset your password: answering your security questions, receiving an email, or using two-factor authentication. Follow the instructions for your chosen method. If you use two-factor authentication, a verification code will be sent to your trusted devices or phone number. Enter this code, then create a new password. Make sure to choose a strong password to protect your account.
