Im guessing you forgot the pass, or you got scammed and want to get the tag back. Call xbox and give them your console serial number so youcan prove its on your xbox an they will most likely let you reset the pass.
The mentality of some of you fucking amazes me. He jacks tags, i'm pretty sure if the problem was simple enough to fix by contacting support he wouldn't have to ask any of you. Use some common sense. He's looking for a glitch, not a password reset.