Position yourself so you can comfortably reach underneath the desk. This might involve kneeling or sitting next to/under the desk.

Remove the two 15.2 mm Phillips #2 screws connecting the crank to the table.

Remove the eight 15.2 mm Phillips #2 screws connecting the table to the legs.

Do not use a power tool to screw/unscrew the screws, as it may crack the desk.