How do you remove a drawer from a silverline four drawer filing cabinet?

There is a small square opening at the bottom center on both the right and left sides of the drawer with a tab that is bent through the drawer wall to the outside of the drawers. This must be bent back until it is fully within the inside of the drawer's storage area. You will need a screwdriver or similar tool to do that. Once that is done open one drawer at a time until fully extended in the open position. The drawers will then lift straight upward, sliding off four tabs located two on each side. It will take some wiggling to get it loose from the four tabs.