If the federal tax lien has not been released within 30 days of satisfying your tax liability, you can request a. Certificate of Release of Federal Tax Lien.A federal tax lien is the government's legal claim against your property when you neglect or fail to pay a tax debt. Requestors should allow 14 days before following up on requests. Two copies of all payoff letters are mailed to the requester. An offer in compromise allows you to settle your tax debt for less than the full amount you owe. The IRS sends the payoff letter with instructions on how much to remit and where to send it. The form used to provide notice of the lien is Form 668(Y) (C), Notice of Federal Tax Lien. Other forms used in the lien program are listed in IRM 5.12. Need relief from IRS owed taxes?