How do i remove my floating shelf?

Depends on how it is attached, do you have a photo?

This is often times more difficult to remove than to install. Did you install it or was it already there? Many floating shelves are secured to the wall with a bracket which has rods sticking forward which go inside the shelf to hold it up. To stop it sliding off a small screw is inserted from the top (sometimes the bottom) of the shelf down through the rod - so look around carefully on top (or bottom) of the shelf for one or two screws - when you remove them the shelf just slides forward off the rods by pulling away from the wall. Let us know if this works! :) Good luck.....

As a lazy person, I might be tempted to use my SawzAll. Taping some cardboard or a plastic placemat to the wall to avoid scratching it.

Just cut along the back of the shelf vertically.

Maybe this will help...

If its on a French Cleat, lift the shelf up. If its on the 3-prong metal plate, there is sometimes a tiny screw underneath holding it in place, take it out, and then slide the shelf towards you to pull it off the hardware.