Samsung Galaxy Tab A (8.0) - Remove a User Account
Only the Owner profile (the first account used to sign in and access the device) can remove an account.
From a Home screen, swipe up or down from the center of the display to access the apps screen.
Navigate: Settings > Accounts and backup > Users.
From the Users and profiles section (located on the right), tap the Delete icon located to the right of the corresponding user.
For restricted accounts, navigate: Settings icon > Delete icon (upper-right).
Tap Delete to confirm.
This removes the user's space and data from the device. The action can't be undone.