There is no IRS Form 999. If you were told to fill out “Form 999” for a Trust Fund Recovery Penalty matter, the instruction is confusing three real forms the IRS actually uses: Form 4180 (the interview the Revenue Officer conducts with you), Form 2751 (the proposed assessment you may sign to agree with the penalty), and Form 2749 (an internal request the IRS generates to post the penalty to your personal account). Only one of these — Form 2751 — is a document you would sign, and signing it has consequences worth understanding before you do.
Here is what each form actually is, in the order you would encounter it, and what your choices are at each step.
Form 4180: The Interview, Not a Form You Complete
Form 4180 is titled Report of Interview with Individual Relative to Trust Fund Recovery Penalty. The Revenue Officer fills it out during a personal interview with you, either in person or by phone. The IRS will not mail you a blank Form 4180 to complete on your own.1Internal Revenue Service. 5.7.4 Investigation and Recommendation of the TFRP
The questionnaire is designed to pin down who controlled the company’s finances and whether that person knew payroll taxes were going unpaid. It asks about your role in the business, your check-signing authority, your involvement in hiring and payroll decisions, and what you knew about the tax delinquency and when. Your answers become the evidence the IRS uses to decide whether you are a “responsible person” who acted “willfully” within the meaning of Internal Revenue Code Section 6672.2Office of the Law Revision Counsel. 26 U.S. Code 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax
Because the Revenue Officer is building a case for personal liability from what you say, this is the stage at which professional representation matters most. There is no line for you to fill in and no signature block to worry about; what matters is what you say and how it is recorded.
Form 2751 and Letter 1153: The Document You May Actually Sign
After the investigation, if the Revenue Officer concludes you are personally liable, the IRS sends you Letter 1153 along with Form 2751, titled Proposed Assessment of Trust Fund Recovery Penalty. This package lists the tax periods, the dollar amounts, and your appeal rights.3Internal Revenue Service. 5.7.6 Trust Fund Penalty Assessment Action
Form 2751 is short. It identifies the business, the quarters at issue, the trust fund amount proposed against you, and provides a signature line. Signing means you agree to the proposed assessment. You have three choices when the package arrives:
- Sign and return Form 2751 to agree. Signing does not permanently lock you in — you can still change your mind within the 60-day appeal window.
- File a written protest within 60 days of the date on Letter 1153 (75 days if the letter was sent to an address outside the United States). This sends the case to the IRS Independent Office of Appeals before any assessment posts.
- Do nothing. If the 60-day window passes without a response, the IRS treats the case as unagreed and moves to assess the penalty anyway.
The 60-day deadline is strict. A protest is timely only if it is postmarked, sent by certified or registered mail, or delivered on or before the 60th day. A private postage meter stamp does not count as proof of the mailing date. If the 60th day falls on a weekend or federal holiday, the deadline moves to the next business day.3Internal Revenue Service. 5.7.6 Trust Fund Penalty Assessment Action
Before signing Form 2751, understand what agreement means. You are consenting to a penalty equal to the full unpaid trust fund taxes — the withheld income tax and the employee share of Social Security and Medicare — dollar for dollar.4Internal Revenue Service. Trust Fund Recovery Penalty (TFRP) Overview and Authority Once assessed, the balance lives on your personal tax account and the IRS has ten years to collect it.
How to File the Written Protest Instead
If you disagree with the proposed assessment, the form of your appeal depends on the dollar amount. For proposed penalties of $25,000 or less per tax period, you can file a small case request — a brief letter explaining why you disagree, sent to the contact person named on Letter 1153. For amounts above $25,000, a formal written protest is required.5Internal Revenue Service. 8.25.2 Working Trust Fund Recovery Penalty Cases in Appeals
A formal written protest must include:
- Your full name, address, and Social Security number.
- A copy of Letter 1153, or the letter’s date and number.
- The tax periods you are disputing.
- A detailed explanation of your duties and responsibilities at the business, with specific dates, names, amounts, and facts that support your position.
- A signed statement, under penalties of perjury, declaring that the facts in your protest are true, correct, and complete.
The Appeals officer can remove all or part of the penalty if the evidence supports it — for example, if the IRS misidentified you as a responsible person or attributed authority to you that you did not actually have.
Form 2749: An Internal IRS Document, Not Something You Fill Out
Once the appeal window closes or Appeals issues a determination, the Revenue Officer generates Form 2749, Request for Trust Fund Recovery Penalty Assessment. This is an internal IRS document. You do not receive it, fill it out, or sign it.6Internal Revenue Service. 5.19.14 Trust Fund Recovery Penalty (TFRP)
Form 2749 contains your name, Social Security number, the business name and Employer Identification Number, the tax periods, and the trust fund amounts to be assessed. Most are generated electronically through the IRS’s Automated Trust Fund Recovery system, and the Compliance Campus is required to process each one within two business days of receipt. After the assessment posts, you will receive a notice and demand for payment.
If anyone tells you to fill out Form 2749, they are mistaken about what the form is.
After Assessment: What You Can Still Do
Once the penalty is on your personal account, the IRS can file federal tax liens, levy bank accounts, garnish wages, and seize assets during the ten-year collection window. Before a levy, the IRS must send a Notice of Intent to Levy along with notice of your right to a Collection Due Process hearing. You request that hearing on Form 12153 within 30 days of the levy notice.7Internal Revenue Service. Request for a Collection Due Process or Equivalent Hearing A timely CDP request stops levy action and pauses the collection clock until Appeals issues its determination. Miss the 30-day window and you can still ask for an equivalent hearing within one year, but that will not stop collection or pause the statute.
There is also a judicial path. Under Section 6672(c), you can pay the penalty for a single employee for a single quarter — the minimum needed to sue — file a claim for refund, and if the IRS denies it (or does not respond within six months), file suit in U.S. District Court or the Court of Federal Claims within 30 days.2Office of the Law Revision Counsel. 26 U.S. Code 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax Posting a bond equal to one and a half times the remaining balance stops collection during the suit. The Tax Court has no jurisdiction over TFRP cases, so this refund route is the only way to get a federal court to review whether you were actually responsible and willful.
The Short Version
If you are looking for Form 999, you are looking for a form that does not exist. The form the IRS will ask you to sign — if it wants you to sign anything — is Form 2751, and it arrives with Letter 1153 and a hard 60-day deadline. Before you sign, read what you are agreeing to, and know that filing a written protest within those 60 days is the option that preserves every right you have to contest the penalty administratively.