IRS Form 843 2026: Fillable, Printable PDF & Instructions

IRS Form 843 2026 – IRS Form 843, officially Claim for Refund and Request for Abatement, helps U.S. taxpayers request refunds of certain overpaid taxes, penalties, interest, or fees. The current version (Rev. December 2024) remains in use for 2026 filings.

This comprehensive guide provides everything you need to know for successful filing in 2026, including download links, step-by-step instructions, mailing addresses, and important deadlines.

What Is IRS Form 843 Used For?

Form 843 is designed for specific refund and abatement requests that cannot be handled on other forms.

Primary purposes include:

  • Abatement (cancellation or reduction) of penalties and additions to tax for reasonable cause or other legal reasons.
  • Abatement of interest due to IRS errors or delays (under IRC Section 6404(e)(1)).
  • Refunds of excess Social Security, Medicare, or Railroad Retirement Tax Act (RRTA) taxes withheld in error (with employer non-adjustment).
  • Refunds or abatements related to certain fees, such as the Branded Prescription Drug Fee.
  • Relief from Trust Fund Recovery Penalties (Section 6672) or other civil penalties.
  • Protective claims for potential refunds tied to ongoing litigation, including COVID-era penalty and interest relief under Kwong v. United States.

Important limitations: Do not use Form 843 for income tax refunds or amendments (use Form 1040-X), most employment tax adjustments (use Form 941-X, etc.), or excise tax credits claimable elsewhere. Always review the official instructions for your specific situation.

Download Fillable & Printable IRS Form 843 PDF for 2026

The form is two pages and fully fillable in Adobe Acrobat Reader (recommended). It cannot be e-filed — you must print, sign, and mail the completed form. Save a copy for your records.

Step-by-Step Instructions: How to Fill Out IRS Form 843?

Prepare a separate Form 843 for each tax period or fee year unless an exception applies. Use the December 2024 instructions for guidance.

Reason for Filing (Top Section)

Check the appropriate box(es):

  • Penalty abatement (reasonable cause, first-time abatement, etc.).
  • Interest abatement (IRS error/delay).
  • Refund of specific taxes or fees.
  • Other (specify clearly).

Identification Information

Enter your name, SSN (or EIN), address, and daytime phone number. For joint returns, include spouse details. Provide the name and address from the original return if different.

Line 1: Tax Period or Fee Year

Enter beginning and ending dates (MM/DD/YYYY).

Line 2: Amount to Be Refunded or Abated

Enter the total dollar amount claimed.

Line 3: Date(s) of Payment(s)

List payment dates (attach extra sheets if needed).

Line 4: Type of Tax or Fee

Check the relevant category (Employment, Excise, Fee, Civil Penalty, etc.). Check only one unless exceptions apply.

Line 5: Type of Return or Fee

Specify the form (e.g., 941, 1040, Branded Prescription Drug Fee, or Other).

Line 6: IRC Section (for Penalties)

Enter the Internal Revenue Code section from your IRS notice.

Line 7: Reason for Request

Check the most applicable box (reasonable cause, IRS erroneous advice, etc.).

Line 8: Explanation

Provide a detailed, factual explanation with calculations. Attach supporting documentation such as IRS notices, payment proofs, and evidence of reasonable cause.

Signature and Preparer Information

Sign and date the form. Both spouses must sign for joint matters. Paid preparers must include PTIN and firm details.

Attach all required documents and keep copies.

Where to Mail IRS Form 843 in 2026?

Mailing addresses vary by situation.

  • In response to an IRS notice: Use the address provided on the notice.
  • General penalty/interest abatement or most claims: Refer to the IRS “Where to File” page for Form 843 or the address based on your primary tax return type.
  • Branded Prescription Drug Fee: Internal Revenue Service, Mail Stop 4921 BPDF, 1973 N. Rulon White Blvd., Ogden, UT 84404 (write “Branded Prescription Drug Fee” at the top).
  • Estate/Gift tax matters: Specific Florence, KY address (see instructions).
  • Net interest rate of zero requests: Appropriate service center for your most recent return.

Use certified mail with return receipt for proof of filing, especially for time-sensitive claims.

2026 Deadlines and Special Considerations

  • General refund claims: Generally 3 years from the return filing date or 2 years from payment, whichever is later.
  • COVID-Era Protective Claims (Kwong litigation): Many taxpayers should file protective claims by July 10, 2026, to preserve rights for potential refunds of penalties and interest assessed during the COVID disaster period. Write “Protective Refund Claim Pursuant to Kwong v. United States” (or similar) across the top of Form 843.
  • Processing times can take several months. Track your claim via IRS account transcripts or by phone.

Tips for Success and Common Mistakes to Avoid

  • Provide clear, well-documented explanations with strong supporting evidence.
  • Double-check that Form 843 is the correct form for your issue.
  • Consider first-time abatement eligibility, which may be granted without full reasonable cause proof in some cases.
  • Consult a tax professional or Enrolled Agent for complex situations, large amounts, or appeals.
  • Visit the official IRS page for the latest updates: About Form 843.

Disclaimer: This article is for informational purposes based on official IRS sources as of 2026. Tax rules can be complex and subject to change. For personalized advice, consult a qualified tax advisor or the IRS directly. IRS.gov remains the most trusted resource.