A lien is merely a statement alleging that you owe a tax debt. It is legally created anytime you owe taxes. It can show up on your credit report, and if the IRS locates property you own, it can be filed against the property. The most common example is a lien filed against your home. Once filed, you cannot sell the asset until the lien is paid off. For houses, the payoff is part of closing. And if you don't have sufficient equity to payoff the mortgage(s) and lien, you can only sell your home by bringing your own money to closing.
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