Step 1: Plan the sink placement.
Decide where you want the sink to be placed on the dresser top. Remove the drawers and any drawer supports that would interfere with the plumbing. Most sinks come with a positioning template; if yours does not, trace the sink outline onto paper to create one. Cut out the template and tape it in the desired place on the dresser top; trace around it. If the faucet sits on the countertop as in this example, mark its placement, too.

Carefully make the sink cutout with a jigsaw.

Step 2: Cut the openings.
Determine the location of the water supply and drain lines. Mark these on the back of the dresser. Using a jigsaw, cut the sink, faucet, and water supply/drain line openings.