On the Home screen, open the application list and select Settings> Privacy> Factory data reset>
Device Reset> Erase everything.
If not lets us menus, do the reset using the buttons:
We turn off the Samsung galaxy Tab
Once turned off, press and let down the volume up button and the power button until the logo appears.
With the volume buttons move and select "wipe data / factory reset, factory data reset".
Pressing the power button, the selection is confirmed and the tablet will be reset.