Welcome to Android Forum -- Thanks for joining. Note: In settings inside the account in question - you should see the option of deleting account. This Only delete the account off the device.
It's nice to have you aboard....Make sure to tap or click the Phones or Tablets -Link in my signature - from there just scroll down to your device model - You can then join your device's area of discussion - where other users will give you help on getting the most out of your device.
There are lots of Help, Hints, Tips & Tricks for all Android Devices. I hope you find Android Forum informative and prove to be useful! Happy Holidays.!
If the email account is not registered to the device, the only way to get rid of it is to perform a full factory reset. Go to menu>settings>privacy and you should see the option there. If you need to do it manually, then the folks in Velocity Micro Cruz Tablet T301 - Android Forums may be able to give you specific instructions.