IRS Letter 4000: Last Opportunity Letter (Appeals)

Letter 4000 is the Last Opportunity Letter issued by the IRS Office of Appeals. It is a mandatory second-chance notice sent before Appeals closes a case against a taxpayer who has not responded to prior correspondence or has not provided information Appeals needs to resolve the case. The letter sets a firm deadline and explains that failure to respond will result in Appeals closing the case against you.

Why This Letter Exists

Appeals is required to give taxpayers a reasonable opportunity to be heard. When a taxpayer has filed an appeal (CDP request, protest, or similar) but then stops responding to Appeals' requests for information or scheduling, Appeals does not simply close the file in silence. The Last Opportunity Letter is the formal second chance, telling the taxpayer exactly what is needed, by when, and what happens if it is not provided.

What to Do

Read the letter carefully. It should identify what Appeals needs: a response to a scheduling letter, specific financial information, documentation of a position, or confirmation that you still want to proceed with the appeal. Provide what is requested by the deadline. If the deadline is impossible, call the Appeals Officer or Settlement Officer named in the letter and request an extension before the deadline passes. Extensions are routinely granted when requested in good faith.

What Happens If You Do Not Respond

Appeals closes the case using the information already in the file, which almost always means the determination goes against the taxpayer. In a CDP case, this means a Notice of Determination (Letter 3193) is issued sustaining the IRS's proposed collection action. In a deficiency protest, Appeals returns the case to Compliance with a statement that Appeals was unable to secure cooperation. Either way, the next step is enforcement.

Why Representation Matters at This Stage

A Last Opportunity Letter often reflects a case where communication has broken down for predictable reasons: the taxpayer missed earlier letters, found the process overwhelming, or did not have representation lined up. Bringing in a representative at this point can preserve the appeal and reopen the dialogue with the Appeals Officer, who generally prefers to resolve the case rather than close it against the taxpayer.

If you received Letter 4000, call us at (813) 229-7100. The deadline is firm and the cost of letting it pass is high.