You may want to learn how to factory reset the Amazon Kindle Fire if you want to erase all data and settings from the device. You can perform a factory reset using the menus on the device. Just follow these steps.
1. Tap the settings gear in the upper-right corner, then tap More…
2. Tap Device.
3. Select Reset to Factory Defaults.
4. Select Erase everything to confirm that you would like to erase all data and settings from the Kindle Fire.