A federal tax lien is the government's legal claim against your property when you neglect or fail to pay a tax debt. You can find the CP or LTR number on the right corner of the letter.If you live in: Send your payments here: Florida, Louisiana, Mississippi, Texas, Internal Revenue Service Center Austin, TX 733010010. They should use eDemand to submit a lien payoff request 3. Once we process the request and receive payment, we will release the lien. For us to consider an installment. Installment agreement for your overdue taxes, you Agreement must complete Form 433F, Collection. You can get in-person help at your local IRS Taxpayer Assistance Center. Call for an appointment after you find a Taxpayer Assistance Center near you. Compare the information in the notice or letter with your return.