If it is the 32" Toshiba TV, you simply grab it on each side or bottom with one hand and one on the top, lift up, you may have to wiggle it as you lift up. It should come out of the mount.
When you get it off the bracket, you are limited to where you can put it down because of all of the wires that are hooked to the TV. You will more than likely have to set it on the TV right side on the floor. Have a towel handy to set it on.
I lubricated the slide mount knobs on the back of the TV to make it easy to remove and reinstall.
You will more than likely need a HDMI cable with a 90° fitting for the back of the TV.