If you forgot your parental control password. To reset your Parental Controls password:
1.Enter an incorrect password five times.
2.Tap Reset Your Parental Controls Password link. ...
3.Enter your Amazon account password (this is the password you used to register your device, and to sign in to Amazon).
4.Enter your new Parental Controls password.
If you tried all above steps to reset but not able to do so. then contact Kindle assistance to reset parental control passcode through tech team.
Visit us at :- http://kindletechhelp.com/