I got this bill for department of Labor because of over payment on my benefits what happen if I don't pay it?

Call the Number they gave You- & set up a Payment Plan with Them. If you DON'T -they're gonna find a way to "garnish your Wages"- & I PROMISE You- that THOSE Terms are going to be a lot WORSE !!! (and then it REALLY WILL mess up your Credit...). :(