Tablet won't let me sign in it keeps going back and send previously synced To account

[busycake551u]

We forgot the password to the tablet so we reset it and again reset it and it keeps going back to the same screen saying it's not previously synced with something . what do I do ?

 

[Graybush]

Can you give us the make and model of the tablet, and what service you're trying to sign in to?