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PART IV – IRS Forms Explained
Federal tax controversy runs on a defined set of forms. Filing the wrong one — or the right one late — changes the outcome of a case more often than any argument made in a letter. This part explains what each form does, who files it, when it is due, and what commonly goes wrong.
Financial Disclosure and Resolution Forms
These forms tell the IRS what a taxpayer can pay. They are the foundation of every collection alternative, and they are where cases are won or lost.
| Form | What it is | Who files it, and when |
|---|---|---|
433-A | Collection Information Statement for Wage Earners and Self-Employed Individuals | Individuals working with a Revenue Officer, or requesting a non-streamlined agreement, CNC status, or a PPIA. |
433-B | Collection Information Statement for Businesses | Corporations, partnerships, and LLCs with an assigned Revenue Officer or seeking a business collection alternative. |
433-F | Collection Information Statement (short form) | Individuals working with the Automated Collection System rather than a Revenue Officer. Less detail than 433-A; the IRS may still request the long form. |
433-A (OIC) | Collection Information Statement for Offer in Compromise — individuals | Submitted with Form 656. Structurally different from 433-A: it computes net realizable equity and the future income multiplier. |
433-B (OIC) | Collection Information Statement for Offer in Compromise — businesses | Submitted with Form 656 for non-sole-proprietor entities. |
433-D | Installment Agreement | Establishes the terms of an accepted agreement, including direct debit authorization. |
656 | Offer in Compromise | Doubt as to collectibility or effective tax administration. $205 fee per offer unless Low-Income Certification applies. |
656-L | Offer in Compromise (Doubt as to Liability) | Used when the taxpayer disputes that the tax is owed. No application fee and no financial statement. |
9465 | Installment Agreement Request | Requests a monthly payment plan. Most qualifying individuals can apply online instead. |
Appeals, Disputes, and Relief Forms
These forms preserve rights. Nearly all of them carry a hard deadline, and missing it usually forfeits the remedy rather than delaying it.
| Form | What it is | Deadline and consequence of missing it |
|---|---|---|
12153 | Request for a Collection Due Process or Equivalent Hearing | 30 days from a Final Notice of Intent to Levy or from the lien filing notice. Missing it forfeits Tax Court review; an equivalent hearing remains available for one year but carries no judicial review. |
9423 | Collection Appeal Request (CAP) | Generally within 2 business days of a conference request following certain collection actions. Faster than CDP but the determination cannot be appealed to Tax Court. |
8857 | Request for Innocent Spouse Relief | Generally within 2 years of the first collection activity for relief under § 6015(b) or (c). Equitable relief under § 6015(f) may be requested while the collection statute remains open. |
8379 | Injured Spouse Allocation | A different remedy entirely — it recovers a spouse’s share of a refund offset for the other spouse’s separate debt. File with the return or afterward. |
843 | Claim for Refund and Request for Abatement | Used for penalty abatement claims and certain interest abatement. Refund claims are governed by the § 6511 limits (3 years from filing or 2 years from payment). |
12661 | Disputed Issue Verification (Audit Reconsideration) | No fixed deadline, but reconsideration is unavailable once the liability has been paid in full or settled by agreement. |
911 | Request for Taxpayer Advocate Service Assistance | Used where a taxpayer faces immediate hardship or an IRS process has broken down. No deadline, but it is not a substitute for a statutory appeal. |
Representation, Lien, and Investigation Forms
| Form | What it is | Notes |
|---|---|---|
2848 | Power of Attorney and Declaration of Representative | Authorizes an Enrolled Agent, CPA, or attorney to act for the taxpayer — receive notices, negotiate, and appear. Must specify tax types and periods. |
8821 | Tax Information Authorization | Permits inspection of account information only. It confers no authority to represent, argue, or negotiate. |
4180 | Report of Interview With Individual Relative to Trust Fund Recovery Penalty | The Revenue Officer’s interview instrument for determining responsibility and willfulness. Answers here frequently decide personal liability. |
12277 | Application for Withdrawal of Filed Notice of Federal Tax Lien | Requests removal of the public lien notice — distinct from a release, which only shows the debt satisfied. |
14134 | Application for Certificate of Subordination of Federal Tax Lien | Allows a refinance or new lending to take priority over the tax lien. |
14135 | Application for Certificate of Discharge of Property From Federal Tax Lien | Removes a specific piece of property from the lien, typically to permit a sale to close. |
656-PPV | Offer in Compromise Periodic Payment Voucher | Used for the monthly payments required while a periodic payment offer is under evaluation. |
Form Index — Quick Reference
Forms in numeric order, with the chapter in this guide that covers the underlying procedure in depth.
| Form | Purpose | See |
|---|---|---|
433-A / 433-B | Full financial disclosure to a Revenue Officer | Ch. 27 |
433-F | Short-form financial disclosure to ACS | Ch. 27 |
433-A (OIC) / 433-B (OIC) | Financial statement supporting an offer | Ch. 7-11 |
433-D | Installment agreement terms and direct debit | Ch. 12 |
656 / 656-L | Offer in Compromise; doubt as to liability | Ch. 7-11 |
843 | Penalty and interest abatement claims | Ch. 14 |
911 | Taxpayer Advocate Service assistance | Ch. 4 |
2848 / 8821 | Representation; information access | Part VIII |
4180 | Trust Fund Recovery Penalty interview | Ch. 23 |
8379 | Injured spouse refund allocation | Ch. 15 |
8857 | Innocent spouse relief | Ch. 15 |
9423 | Collection Appeal Program request | Ch. 16 |
9465 | Installment agreement request | Ch. 12 |
12153 | Collection Due Process hearing request | Ch. 16 |
12277 | Withdrawal of a filed lien notice | Ch. 21 |
12661 | Audit reconsideration | Ch. 20 |
14134 / 14135 | Lien subordination; lien discharge | Ch. 21 |
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