Similar to any other password protected device, you won’t be able to get past the Lock screen, if you forget the login password for your Kindle Fire Tablet. However, the good news is that Amazon provides the option to reset the forgotten password by logging into your Amazon Account.
If you do not have an Amazon Account, the only way to gain access to your device is by Factory Resetting your Amazon Fire Tablet; which results in loss of data.
1. Reset Kindle Fire Password Using Amazon Account
All that is required to reset the login password of an Amazon Fire tablet is to access the “Reset Password” screen, which becomes available when you make multiple efforts to login to your device by entering an incorrect password.
1. Open Kindle Fire Tablet > Enter any random four-digit PIN on the Lock screen of your device and you will see “Please Try Again” prompt.
2. After this, try to enter the incorrect Password or PIN 4 more times.
3. On the fifth attempt you will see a pop, providing you with the option to “Factory Reset” or Reset Kindle Fire Password. Since, you have an Amazon Account, tap on RESET PASSWORD option.

4. On the next screen, enter your Amazon Account Password and tap on Continue.

5. On the next screen, type your New PIN/Password, confirm Password/PIN and tap on Save.

After this, you will be able to login to your Fire Tablet by using the New Password and gain access to all your content and personal settings.
2. Remove Kindle Fire Password
If you do not have an Amazon Account, you won’t be able to use the password reset process. In this case, the only way to gain access to your device is by removing the forgotten password.
This can be done by performing a Factory Reset process on your Fire Tablet, which erases all the data from your device, including its forgotten password.
1. Enter any random four-digit Pin and you will see “Please Try Again” prompt on the screen of your device
2. Try to Enter the pin 4 more times. On the fifth incorrect attempt you will see a pop. Since you do not have an Amazon account, tap on Factory Reset option.

3. Once the Reset process is completed, Kindle Fire tablet will Restart and prompt you to choose your Language. Select your Language and tap on Continue.

4. Next, select your Wi-Fi Network and enter your Password to connect.

5. On the next steps, you will be required to setup an Amazon Account by providing your Email address and entering a Password to login to your Amazon Account.
Once Kindle Fire is registered to an Amazon Account, you will be able to download apps, books, music and other content from Amazon.