File Form 966 by mail with the IRS Service Center that processes your corporation’s income tax return, and get it postmarked within 30 days of the date your board or shareholders adopt the plan of dissolution or liquidation. There is no central address for the form and no e-file option.1Internal Revenue Service. Form 966 – Corporate Dissolution or Liquidation
The Mailing Address Matches Your Income Tax Return
The Form 966 instructions tell you to file the form “with the Internal Revenue Service Center at the address where the corporation (or cooperative) files its income tax return.”1Internal Revenue Service. Form 966 – Corporate Dissolution or Liquidation Look up the address for your most recent Form 1120 if you are a C-corporation, or Form 1120-S if you are an S-corporation, and send Form 966 to that same Service Center.
The IRS publishes a state-by-state table of Form 1120 mailing addresses, split by whether the corporation’s total assets are $10 million or more and whether Schedule M-3 is filed.2Internal Revenue Service. Where to File Your Taxes for Forms 1120 The two processing centers that handle corporate returns are Kansas City, Missouri and Ogden, Utah. Pull up the current table, match your state and asset level, and use that exact address on the envelope.
If your corporation has moved or changed its principal office, update the IRS with Form 8822-B before or alongside the Form 966 so the mailing address on file matches the Service Center you are using.3Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business Sending the form to the wrong center can delay processing and muddy the question of whether you met the 30-day deadline.
Paper Only, and Prove the Postmark
Form 966 cannot be filed electronically. You have to mail the physical form together with a certified copy of the dissolution resolution, which rules out e-filing regardless. Use certified mail with return receipt requested. Under Internal Revenue Code Section 7502, the U.S. postmark on the envelope is treated as the delivery date for meeting the filing deadline, so a dated postal receipt is your evidence that you filed on time.4Office of the Law Revision Counsel. 26 USC 7502 – Timely Mailing Treated as Timely Filing and Paying
The 30-Day Clock Starts at Adoption
The 30-day window runs from the date the board of directors or shareholders formally adopt the dissolution plan or resolution, not from the date assets are distributed or operations wind down.5Office of the Law Revision Counsel. 26 USC 6043 – Liquidating, Etc., Transactions Record the exact adoption date in the corporate minutes. A vague board record that does not pin down when the resolution was approved makes it harder to show the filing was timely.
Corporations often miss this because the vote to dissolve feels like the start of a long process, and Form 966 gets buried under debt settlement and creditor notices. Thirty days passes quickly, and the obligation runs whether or not anything else has happened yet.
What Goes in the Envelope
Form 966 is a single page. It asks for information the corporation already has on hand:1Internal Revenue Service. Form 966 – Corporate Dissolution or Liquidation
- Corporate name, address, and Employer Identification Number
- Place and date of incorporation
- The date the plan of dissolution was adopted
- The last income tax return filed, the IRS district where it was filed, and the tax year it covered; if the last return was e-filed, enter “e-file” on Line 5
- The Internal Revenue Code section governing the liquidation on Line 10, typically Section 331 for a standard liquidation or Section 332 for a subsidiary liquidation
A certified copy of the resolution or plan of dissolution must be attached. This is required, not optional. The certified copy has to be a complete and accurate transcription of the document the shareholders or directors actually adopted, and a corporate officer, usually the Secretary, signs the certification.6eCFR. 26 CFR 1.6043-1 – Return Regarding Corporate Dissolution or Liquidation State law governs what makes a dissolution plan valid, so confirm the resolution meets the requirements of your state of incorporation before attaching it.
If the Plan Changes, File Again
An amendment or supplement to the dissolution plan restarts the clock. You must file another Form 966 within 30 days of adopting the change, showing the date the original Form 966 was filed, attaching a certified copy of the amendment, and supplying anything required by the form that was not covered on the earlier return.6eCFR. 26 CFR 1.6043-1 – Return Regarding Corporate Dissolution or Liquidation
Plans change more often than corporations expect. Asset sale timelines slip, creditor disputes drag on, distribution structures get renegotiated. Each material change triggers a new 30-day window and a new filing.
Who Does Not File Form 966
Any corporation or farmer’s cooperative that adopts a resolution to dissolve or liquidate any of its stock has to file, covering both full dissolutions and partial stock liquidations, and applying to C-corporations and S-corporations alike.7Internal Revenue Service. About Form 966, Corporate Dissolution or Liquidation Two categories are outside that: tax-exempt organizations such as 501(c)(3) nonprofits, which follow the dissolution procedures in the Form 990 or Form 990-PF instructions, and qualified subchapter S subsidiaries.1Internal Revenue Service. Form 966 – Corporate Dissolution or Liquidation Subsidiaries liquidating under Section 332, where a parent owns 80% or more, are still required to file.
What Happens If You Skip It
Form 966 does not carry a clearly defined standalone penalty for late filing, and the instructions do not specify a dollar amount for missing the 30-day window. The collateral consequences are the real concern. Without notice of the dissolution, the IRS may keep expecting annual returns from the corporation, and those unfiled returns can generate failure-to-file notices and associated penalties. Corporations with foreign shareholders or foreign subsidiary structures can face more serious exposure tied to international information returns such as Form 5471.
The practical risk is a tax account that stays open long after the business is gone, quietly accumulating notices on other forms. Getting Form 966 postmarked to the right Service Center inside the 30-day window is inexpensive protection against that.