Depending upon the type of tax lability, there are opportunities to appeal IRS claims throughout the entire administrative process. Failure to win a favorable outcome at any of those levels can be your ticket straight to Tax Court. At which time, you will be issued what is called the “90-Days letter” (Notice of Deficiency).
This letter notifies the taxpayer of the final amount the IRS conclusively believes is owed. The notice gives the delinquent taxpayer 90 days to petition Tax Court for a final hearing. After failing at every level of the administration/appeals process, this is a taxpayer’s final chance to work out their discrepancies with IRS conclusions about their tax debt. There are no further appeals after this process; the case is sent back to collections with that final decision. New liens, levies, seizures, and garnishments may now be applied to your assets for the newly litigated amount. Remember, IRS debt is still due — whether the same amount or a reduced amount.