Remove the retainer that is holding the connector or slide the connector end off the retainer from the inside of the rear bumper fascia.
Use a small flat bladed tool to release the license lamp assembly from the inside of the rear bumper fascia.
Replace the bulb as necessary.
The release tab is located on the forward side of the lamp assembly.
I bet this would be more helpful while looking at the bumper. The bulbs are a 194 and you can go here to find LED's