A lien is a legal claim against your property to secure payment of your tax debt in case you try to sell property. The IRS files a Notice of Federal Tax Lien in the county of your residence to alert creditors that the government has a legal right to your property. This is usually not too harmful if you are not planning on selling any property; and if you are not concerned with your credit because the lien does appear on your credit report. The problem with a lien normally arises when you try to sell real estate. You will not be able to sell the real estate. You will need a lien discharge. Call IRS Tax Fighters at 1-888-959-2671 for help.