This is the main one in Las Vegas- this is where the local news stations film people dropping of their tax filing at the very latest possible time- convenient closing time. The line inside is pretty quick. The parking lot is very accommodating. Forms for passports and tax filing forms (during tax time) along with customs forms, certified return receipt forms are all located in the lobby. If I remember correctly, there is a self-service station on the right side of the post office, if you just want to drop off a letter or clasp envelope.