Form 843 Explained: How to Claim a Refund or Penalty Abatement
- What is IRS Form 843?
- The December 2024 Redesign Changed Where Every Entry Goes
- Form 843 and the Kwong Ruling
- Form 843 and Form 1040-X Cover Different Refunds
- Who Needs to File IRS Form 843?
- How to File IRS Form 843?
- Penalty Abatement Is the Most Common Use of Form 843
- Form 843 Claims Move on a Slower IRS Track
- A Few Common Mistakes Sink Form 843 Claims
- Frequently Asked Questions About Form 843
IRS Form 843, Claim for Refund and Request for Abatement, is the form you use to ask the IRS for a refund of certain taxes, penalties, interest, or fees you have already paid, or to remove (abate) penalties and interest it has assessed that you have not yet paid. It is not used for income tax refunds, which go on Form 1040-X. The current version is Form 843 (Rev. 12-2024), and for nearly every reason on the form it is filed on paper. The one exception is a claim citing Kwong v. United States for fully paid penalties and interest, which individuals can e-file through their IRS Online Account.
Where you mail Form 843 depends on why you are filing. If you are responding to an IRS notice, send it to the address on that notice; for most other penalty claims, the Form 843 instructions direct you to the IRS service center where you would file a current-year return for that tax. A refund claim is generally due within 3 years of filing the original return or 2 years of paying the tax or penalty, whichever is later. For penalties, the two most common grounds are first-time abatement and reasonable cause, and Line 8 is where you explain, with dates and figures, why the IRS should allow your claim.
We File Form 843 for Americans, Correctly and on Time.
What is IRS Form 843?
IRS Form 843, officially titled Claim for Refund and Request for Abatement, is the IRS’s general-purpose claim form for two related but distinct asks:
- A refund of certain taxes (other than income tax), interest, penalties, additions to tax, or fees you have already paid
- An abatement of certain penalties, additions to tax, or interest the IRS has assessed, but you have not yet paid
The form runs two pages and asks you to identify your reason for filing, the tax period, the amount, the type of tax and return involved, the Internal Revenue Code section behind any penalty, and the facts that support your claim. The written explanation on Line 8 is where most successful claims live or die.
Form 843 is not connected to your annual income tax return. You file it separately, on paper, to the IRS address tied to the underlying tax or notice, unless you qualify for the narrow Kwong e-filing exception described below.
The December 2024 Redesign Changed Where Every Entry Goes
The IRS redesigned Form 843 in December 2024. If you are working from an older guide, a prior return, or a sample you saved years ago, the line numbers will not match the form in front of you. The biggest change: your reason for filing is now a set of checkboxes at the very top of the form, above your name, grouped under Tax, Penalty, Interest, and Other. You check exactly one. The rest of the form was renumbered around it.
A few of the boxes themselves also changed. Line 4 now includes a Fee box and a Civil penalty box, and Line 5 now lists more return types (944, 945, CT-2, and the Branded Prescription Drug Fee). The signature block added space for an Identity Protection PIN. Always download the current form straight from IRS.gov so you are working from Rev. 12-2024.
Form 843 and the Kwong Ruling
In Kwong v. United States, the U.S. Court of Federal Claims read the COVID-19 disaster declaration as postponing federal tax deadlines from January 20, 2020, through July 10, 2023. Taxpayers then used Form 843 to file protective refund claims for late-filing and late-payment penalties, as well as interest charged during that window.
The main deadline for those claims passed on July 10, 2026, and the government has appealed the ruling. A COVID-era penalty paid within the last two years may still be claimed under the general rule in IRC Section 6511: 3 years from filing or 2 years from payment, whichever is later.
Individual taxpayers with an existing IRS Online Account can still e-file a Kwong claim for fully paid interest and penalties. According to the IRS, this is currently the only reason for filing Form 843 that qualifies for e-filing.
If you already filed a Kwong claim, our guide to Kwong COVID penalty refund claims explains what each IRS letter means and where the appeal stands. For the Line 8 wording on a claim that is still in time, see what to write on Line 8.
Paid a COVID-Era Penalty in the Last Two Years?
Form 843 and Form 1040-X Cover Different Refunds
Form 843 covers a specific lane in the IRS refund-and-abatement system. The most common mix-up is between Form 843 and Form 1040-X, the form you use to amend an income tax return.
| If you want to | Use this form |
|---|---|
| Refund or abate penalties or interest the IRS assessed | Form 843 |
| Refund Social Security or Medicare tax wrongly withheld (and your employer will not refund it) | Form 843 |
| Refund excise tax, employment tax, or certain other non-income taxes | Form 843 |
| Amend your income tax return to claim a refund of income tax | Form 1040-X |
| Extend your filing deadline | Form 4868 (expats can also use Form 2350) |
| Make a voluntary disclosure | Form 14457 |
If your refund relates to income tax shown on your Form 1040 (a missed deduction, a missed credit, an overstated income figure), Form 843 is the wrong form. Use Form 1040-X.
Who Needs to File IRS Form 843?
Form 843 is not tied to one type of filer. It is used by:
- U.S. taxpayers seeking penalty abatement after receiving a notice (CP14, CP501, CP503, CP504, or similar)
- Taxpayers who have already paid a penalty they believe was incorrectly assessed
- Workers requesting a refund of wrongly withheld Social Security or Medicare tax, including F-1 students, J-1 scholars, members of religious orders, and certain foreign workers
- Taxpayers requesting interest abatement due to unreasonable IRS error or delay (a high bar)
- Taxpayers claiming a refund of COVID-era penalties under the Kwong ruling, when the claim is still within the refund window
- U.S. expats asserting reasonable cause for a missed deadline due to expat-specific circumstances, such as a foreign mail disruption, illness abroad, or a tax preparer’s failure
How to File IRS Form 843?
Form 843 is a paper-only filing for nearly every filing reason. The one exception: individual taxpayers with an IRS Online Account filing a Kwong claim for fully paid penalties or interest can e-file instead. Here is the process for the current Rev. 12-2024 form, in order.
- Check your reason for filing at the top of the form. This checkbox block sits above your name. For a penalty claim, check “Abatement or refund of a penalty or addition to tax due to reasonable cause or other reason allowed under the law.” Check only one box.
- Complete the identifying information: name, address, SSN or EIN, and your spouse’s SSN if the claim relates to a joint return.
- Line 1: Enter the tax period (a beginning date and an ending date).
- Line 2: Enter the dollar amount of the refund or abatement you are requesting.
- Line 3: Enter the date (s) you paid if you are claiming a refund for something you have already paid. Entering a payment date here is what signals a refund rather than an abatement.
- Line 4: Check the type of tax or fee the claim relates to (Employment, Estate, Gift, Excise, Income, Fee, or Civil penalty).
- Line 5: Check the type of return the item relates to. Box i is 1040.
- Line 6: Enter the Internal Revenue Code section the penalty is based on, if you know it. It is usually shown on the IRS notice.
- Line 7: Check the box for your reason: a interest from IRS error or delay, b a penalty from erroneous IRS written advice, c reasonable cause or other reason allowed under the law, or d none of the above.
- Line 8: Explain why the claim should be allowed and show how you computed the amount on Line 2. Cite specific facts and dates. This is the most important section.
- Sign and date the form, and attach supporting documents: a copy of the IRS notice, medical records, mail receipts, professional advice records, or other evidence of reasonable cause.
- Mail it to the IRS address tied to the underlying tax type, listed in the Form 843 instructions. If you are responding to a specific IRS notice, mail it to the address on that notice. For Kwong claims specifically, mail to Internal Revenue Service, 1973 N Rulon White Blvd., Ogden, UT 84201, or file electronically if you have an IRS Online Account.
Keep a copy of everything. Form 843 claims can take 3 to 6 months or longer to process, especially during peak filing periods.
Important: Filing as a Protective ClaimIf you are filing Form 843 to preserve your refund right while a legal or factual contingency is still pending (a court ruling on appeal, awaiting further IRS guidance, or ongoing transcript review), mark the form as a protective claim. Write “PROTECTIVE CLAIM” prominently at the top of the form, above the reason checkboxes, and add one sentence on Line 8 stating that the filing is submitted as a protective claim under Treas. Reg. Section 301.6402-2(b)(1).
For Kwong claims specifically, write “Kwong vs. United States” across the top instead, so the IRS routes the submission correctly, and add the same protective-claim sentence on Line 8.
A protective claim preserves your filing within the statute of limitations and can be supplemented later once the contingency is resolved. Most Kwong COVID-era penalty claims were filed this way before the July 10, 2026, deadline, and the same marking applies to a claim for a recently paid penalty.
Penalty Abatement Is the Most Common Use of Form 843
Penalty abatement is the single most common reason to file Form 843. The IRS assesses penalties in several categories, and Form 843 is the vehicle for requesting their removal. Two pathways matter most.
Reasonable Cause Abatement
The IRS will abate certain penalties if you can show you exercised ordinary business care and prudence but were still unable to meet your tax obligations. The reasonable-cause categories the IRS regularly accepts include:
- Death, serious illness, or unavoidable absence of the taxpayer or an immediate family member
- Fire, casualty, natural disaster, or other disturbance that affected your ability to file or pay
- Inability to obtain records despite reasonable efforts
- Erroneous written advice from the IRS that you relied on in good faith
- Reliance on a qualified tax professional in limited circumstances
Ignorance of the law and simple oversights are rarely accepted. On a reasonable-cause claim, you check box c on Line 7, and the explanation on Line 8 should be specific, factual, and tied to dates.
First-Time Abatement (FTA)
The IRS also offers a separate First-Time Penalty Abatement for a single penalty if you meet three criteria: you had no penalties for the three tax years before the year of the penalty (or didn’t need to file then), you filed all currently required returns or a valid extension, and you paid or arranged to pay any tax due. FTA is the easiest path when you qualify, and Form 843 is one way to claim it (you can also request FTA by phone). Our First-Time Abatement breakdown explains who qualifies and how to ask.
Form 843 Claims Move on a Slower IRS Track
The IRS reviews Form 843 claims on a non-priority track, so processing takes longer than for annual returns. A typical timeline:
- Acknowledgment: 4 to 8 weeks after the IRS receives your filing
- Decision: 3 to 6 months in most cases, sometimes longer
- Approval: the IRS adjusts your account and either refunds the money or removes the penalty
- Denial: the IRS sends a notice explaining the reason, with appeal rights
If your claim is denied, you generally have 2 years from the date the IRS mails its notice of claim disallowance (usually Letter 105C or 106C) to file a refund suit in U.S. District Court or the Court of Federal Claims.
A Few Common Mistakes Sink Form 843 Claims
- Working from an outdated form. The December 2024 redesign moved the narrative to Line 8 and payment dates to Line 3. Using old line numbers can put your entries in the wrong place. Download Rev. 12-2024 from IRS.gov.
- Using Form 843 to claim an income tax refund. That requires Form 1040-X.
- Skipping the explanation on Line 8. The IRS treats an unsupported claim as a non-claim.
- Filing past the statute of limitations. The general rule is 3 years from the filing date or 2 years from the payment date, whichever is later.
- Mailing to the wrong IRS address. The correct address depends on the tax or notice involved. Check the instructions or the notice you received.
- Forgetting to attach the IRS notice copy. Including it speeds processing.
- Trying to e-file. Form 843 cannot be e-filed for most reasons on the form. The only current exception is a Kwong claim for fully paid penalties or interest, filed by an individual with an IRS Online Account. Outside that exception, mail the paper form.
Frequently Asked Questions About Form 843
For Kwong COVID-era penalty claims, the main deadline passed on July 10, 2026, though a penalty paid within the last two years may still qualify under the general rule. Always check the deadline tied to the specific penalty or refund you are claiming.
For most reasons, no. Form 843 must be submitted on paper and cannot be e-filed through tax software. One exception exists: individual taxpayers with an IRS Online Account can e-file a Kwong v. United States claim for fully paid interest and penalties through IRS.gov’s Mobile-friendly forms page. Business taxpayers and individuals who prefer not to e-file still mail the completed form, along with all supporting documents, to the IRS address associated with the underlying tax type or notice.
The IRS redesigned the form. Your reason for filing is now a checkbox block at the top, above your name. Payment dates moved to Line 3, the type of tax moved to Line 4, the type of return moved to Line 5, a new reason checkbox now at Line 7, and the written explanation now at Line 8. The old “credit” option was removed.
Form 1040-X amends an income tax return to correct income, deductions, credits, or filing status, usually to claim an income tax refund. Form 843 claims refunds of non-income taxes, penalties, interest, and fees, or asks the IRS to abate penalties that have been assessed. They cover different lanes and use different mailing addresses.
No. FBAR civil penalties are assessed under Title 31 (the Bank Secrecy Act), not the Internal Revenue Code. The IRS enforces them under authority delegated by FinCEN, but Form 843 covers only penalties under the Internal Revenue Code (Title 26), so FBAR penalties go through a separate process.
Most claims take 3 to 6 months. Complex or high-dollar claims, or those filed during peak season, can take longer. The IRS does not provide a status portal for Form 843, unlike for income tax refunds. If you have not heard back within 6 months, you can call the IRS or your local Taxpayer Advocate Service office.
You can file Form 843 on your own, especially for a simple first-time abatement request. For reasonable-cause claims, complex penalty disputes, or large-dollar refunds, working with a tax professional improves your odds, because the explanation on Line 8 is the determining factor. A self-prepared filing can also become evidence in any later dispute, so the wording matters.
Yes. Form 843 covers both refunds of penalties already paid and abatement of penalties assessed but not yet paid. If you have already paid, enter your payment date on Line 3 and check the box for the refund-related reason at the top of the form. If the penalty is still outstanding, you are requesting an abatement and leaving Line 3 blank. The supporting facts on Line 8 work the same way for both.
The Line 8 Narrative Is What Wins or Loses Your Form 843 Claim
The information in this article is for general informational purposes only and does not constitute tax, legal, or financial advice. IRS rules are complex and change over time, and the right form to file depends on the specific facts of your situation. Consult a qualified tax professional before submitting Form 843 for a high-dollar or complex matter.
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