Form 843 (Rev. December 2024): fill out and sign online, free to start
Form 843 is the Internal Revenue Service's “Claim for Refund and Request for Abatement.” In its words: “Use Form 843 to claim a refund or request an abatement of certain taxes, interest, penalties, fees, and additions to tax.” (IRS, About Form 843)
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Also searched as: Form 843, 843 form, IRS Form 843, Claim for Refund and Request for Abatement, IRS penalty abatement form.
843 at a glance
| Agency | Internal Revenue Service (IRS) |
|---|---|
| What it is for | Use Form 843 to claim a refund or request an abatement of certain taxes, interest, penalties, fees, and additions to tax. |
| Who fills it | The person or business making the claim, as the IRS describes it. The printed instructions say: “If you are filing Form 843 to request a refund or abatement relating to a joint return, both you and your spouse must sign the Form 843.” |
| Who it goes to | See “Where To File” in the Instructions for Form 843. |
| Signature | The form has a signature section. It reads: “Under penalties of perjury, I declare that I have examined this claim, including accompanying schedules and statements, and, to the best of my knowledge and belief, it is true, correct, and complete.” |
| Revision | Rev. December 2024 |
| Last checked | |
| Official form and instructions | Official form (PDF) · Official instructions |
For what to enter on each line, read the agency's instructions.
What the agency says
The IRS lists this recent development on its Form 843 page: “Filing Form 843 for claims citing Kwong v. United States,” dated July 1, 2026. Read it on the IRS page before you file.
Source: IRS, About Form 843 (checked November 1, 2026)
How to fill out the 843 with PDFinish
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Questions about the 843 form
Is there a 2026 Form 843?
The IRS lists Form 843 (Rev. December 2024) as its current revision, with the Instructions for Form 843. The form has no year in its name, so there is no separate 2026 edition to look for. This page carries Rev. December 2024 (IRS, About Form 843, read November 1, 2026; the IRS page was last reviewed July 1, 2026).
Is the 843 form free to fill out here?
Free to start. Your 2 free uses in total need no account. Filling in a form and signing it are free; the file you download counts as one of your free uses. After that, start your 7-day free trial of Pro or buy Pro for $2.99 a month.
Is my information uploaded?
No. The form is filled in your browser and never uploaded, so what you type, including any Social Security number or other tax ID, stays on your device. We do not record what you type.
Is this the latest version of Form 843?
It is the version the agency listed as current when we last checked on 2026-11-01: Rev. December 2024. We compare our copy with the agency's every week. If the agency updates the form, this page says so and points to the official link until we update ours.
Can I sign the 843 electronically?
Whether an electronic signature is accepted is up to whoever asked you for the form, unless the agency says otherwise. Check the agency's instructions at https://www.irs.gov/instructions/i843. PDFinish places a picture of your signature on the page; it is not a certificate-based digital signature.
Where do I send the 843?
In the agency's words: See “Where To File” in the Instructions for Form 843. Read the agency's instructions at https://www.irs.gov/instructions/i843.
What do I put in each box of the 843?
We do not tell you what to enter. The agency's own instructions explain each line: https://www.irs.gov/instructions/i843.
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Sources
- IRS, About Form 843: irs.gov/forms-pubs/about-form-843 (checked November 1, 2026)
- Official form (PDF): irs.gov/pub/irs-pdf/f843.pdf (checked November 1, 2026)
- Official instructions: irs.gov/instructions/i843 (checked November 1, 2026)
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