Form 966: Corporate Dissolution or Liquidation Filing

If your corporation is dissolving or liquidating, the IRS wants to know about it. Form 966 is the federal tax form that notifies the IRS your corporation has adopted a plan of dissolution or liquidation. Filing it is required by law under Internal Revenue Code Section 6043(a), and missing the deadline can trigger penalties. This guide walks you through exactly who needs to file, when to file, where to send it, and how to avoid the most common mistakes. If you’re working through the full corporation dissolution process, Form 966 is one of several federal requirements you’ll need to handle.

Each year, the IRS processes roughly 3.8 million final business tax returns. A meaningful share of those come from corporations winding down operations. Whether you’re shutting down a small S corp or liquidating a larger C corporation, understanding Form 966 keeps you on the right side of IRS reporting rules.

What Is Form 966?

Form 966, titled “Corporate Dissolution or Liquidation,” is a one-page IRS form that corporations use to report the adoption of a resolution or plan to dissolve or liquidate. It is not a tax return. It does not calculate any tax owed. Think of it as a formal heads-up to the IRS that your corporation is ending.

The legal basis for Form 966 is 26 CFR § 1.6043-1, which requires every corporation that adopts a resolution or plan for dissolution, or for the liquidation of the whole or any part of its capital stock, to file this form. The IRS uses the information to flag your account and expect a final return.

The form itself asks for basic information: your corporation’s name, EIN, date of incorporation, the date the dissolution plan was adopted, and the Internal Revenue Code section under which the corporation is dissolving. You’ll also attach a certified copy of the resolution or plan.

Who Must File Form 966

The filing requirement applies to domestic and foreign corporations that are dissolving or liquidating under federal tax law. In practical terms, if your entity files (or has filed) Form 1120, Form 1120-S, or another corporate-class return, you likely need to file Form 966.

This includes:

• C corporations (Form 1120 filers)
• S corporations in certain partial-liquidation scenarios (see exemptions below)
• Foreign corporations with U.S. tax obligations
• Corporations liquidating part of their capital stock, not only full dissolutions

If your business is an LLC, sole proprietorship, or partnership, Form 966 does not apply to you. LLCs have their own dissolution steps (see our guide on how to dissolve an LLC), and sole proprietors follow a different business closure process entirely.

Who Is Exempt from Filing Form 966

Several categories of corporations do not need to file:

• S corporations filing a complete dissolution. Per IRS instructions, an S corporation that is completely liquidating does not need to file Form 966. However, an S corporation that is only partially liquidating (redeeming part of its stock) may still need to file.
• Tax-exempt organizations. Entities exempt under Section 501 (nonprofits, charities, etc.) are not required to file Form 966. They have separate dissolution reporting through Form 990.
• Regulated investment companies (RICs) and real estate investment trusts (REITs). These are excluded under the IRS instructions.
• Corporations with no assets and no business activity. If the corporation never operated or holds nothing to distribute, consult a tax professional about whether filing is still expected.

If you’re unsure whether your corporation qualifies for an exemption, err on the side of filing. There is no penalty for filing Form 966 when it wasn’t strictly required, but there can be penalties for not filing when it was.

When to File Form 966

The deadline is tight: within 30 days after the date your corporation adopts the resolution or plan to dissolve or liquidate. This is not 30 days from the date you file articles of dissolution with the state. It’s 30 days from the board vote (or shareholder consent) that formally adopts the dissolution plan.

For example, if your board of directors votes to dissolve on April 10, your Form 966 must be postmarked by May 10.

If your corporation amends the plan of dissolution after the initial filing, you must file an additional Form 966 within 30 days of the amendment. Each version should reference the original filing.

A few timing notes worth knowing:

• Form 966 is separate from your final tax return. You still need to file a final Form 1120 (or 1120-S) for the corporation’s last tax year.
• Filing Form 966 does not extend or affect your final return deadline.
• State dissolution filings (articles of dissolution) are a different process handled at the state level.

How to Fill Out Form 966: Line-by-Line

The form is one page. Here’s what each section asks for, along with the Form 966 instructions translated into plain English:

Lines 1–3: Corporation details. Enter the corporation’s legal name, EIN (Employer Identification Number), and address. Use the same name and EIN that appear on your corporate tax returns.

Line 4: Date of incorporation. The date your corporation was originally formed under state law.

Line 5: Place of incorporation. The state (or country) where you incorporated.

Line 6: Date of adoption of resolution or plan. The specific date the board of directors or shareholders formally voted to adopt the dissolution or liquidation plan. This date starts your 30-day filing clock.

Line 7: Taxable year of final return. The tax year in which you expect to file the corporation’s final income tax return.

Line 8: Total number of shares outstanding at time of adoption. Report common and preferred shares separately.

Line 9: Section of the IRC under which the corporation is dissolving. Most standard dissolutions reference Section 331 (complete liquidation) or Section 332 (subsidiary liquidation into a parent). If you’re not sure which applies, your accountant or tax advisor can confirm.

Attachment: Certified copy of the resolution or plan. You must attach a certified copy of the resolution or plan of dissolution. “Certified” means signed by the corporate secretary or another authorized officer confirming the document is a true copy of the official record.

Form 966 Mailing Address

Form 966 cannot be e-filed. You must mail a paper copy. The IRS mailing address depends on your corporation’s principal office location:

Mail Form 966 to:

Department of the Treasury
Internal Revenue Service Center
Ogden, UT 84201-0042

This address applies to all 50 states and the District of Columbia.

Note: As of the most recent Form 966 revision (October 2016), the IRS directs all filers to the Ogden, UT address. Always verify the current mailing address on the IRS Form 966 page before sending, as IRS processing centers can change.

Send the form via certified mail with return receipt requested. This gives you proof of timely filing if the IRS ever questions whether you met the 30-day deadline.

Penalties for Not Filing

Under IRC Section 6652(l), the penalty for failing to file Form 966 is $10,000 for each occurrence. If your dissolution plan was amended and you failed to file the updated Form 966, that could count as a separate occurrence.

Beyond the direct penalty, not filing Form 966 can create downstream problems:

• The IRS may not recognize your corporation as dissolved, which can lead to automated notices expecting future tax returns.
• If the IRS audits the dissolution, missing Form 966 weakens your compliance record.
• Shareholders reporting liquidation distributions on their personal returns may face questions if the IRS has no matching Form 966 on file.

Filing is free. The form takes 15 to 30 minutes to complete. Compared to a $10,000 penalty, there is no reason to skip it.

Common Mistakes to Avoid

After reviewing how this form trips people up, here are the errors that come up most often:

1. Missing the 30-day window. The clock starts from the board resolution, not from the state filing. Many business owners confuse the two dates.
2. Forgetting the certified copy. The form is incomplete without the attached certified resolution. The IRS can reject the filing.
3. Filing electronically. There is no e-file option for Form 966. It must be mailed on paper.
4. Confusing Form 966 with a final tax return. Filing Form 966 does not replace your obligation to file a final Form 1120 or 1120-S. You need both.
5. Skipping the form for partial liquidations. If you’re redeeming a portion of your capital stock (not dissolving entirely), Form 966 may still be required.
6. Wrong IRC section on Line 9. Section 331 applies to most standard dissolutions. Section 332 is for subsidiary-to-parent liquidations. Using the wrong section can cause processing confusion.

Form 966 vs. Form 1096: Clearing Up the Confusion

One of the most common search mix-ups involves Form 966 and Form 1096. They are entirely different forms with different purposes:

• Form 966 reports your corporation’s plan of dissolution or liquidation. You file it once (plus amendments) during the dissolution process.
• Form 1096 is the “Annual Summary and Transmittal of U.S. Information Returns.” It’s a cover sheet used to transmit paper copies of information returns like 1099s, 1098s, and W-2Gs to the IRS. It has nothing to do with dissolution.

If you’re dissolving a corporation, you may need to file both forms during the wind-down, but for completely separate reasons. Form 966 reports the dissolution itself. Form 1096 transmits any 1099s you issued to contractors or other payees during the final tax year.

Form 966 Filing Checklist

Use this checklist to make sure you haven’t missed anything:

• ☐ Board resolution or shareholder consent adopted and documented
• ☐ Certified copy of the resolution prepared
• ☐ Form 966 completed with correct EIN, incorporation date, and IRC section
• ☐ Shares outstanding reported accurately
• ☐ Form mailed to the correct IRS address (currently Ogden, UT)
• ☐ Sent via certified mail with return receipt
• ☐ Copy retained for corporate records
• ☐ Calendar reminder set for final Form 1120/1120-S filing deadline

For a full breakdown of every step in closing a corporation (state filings, tax clearances, asset distribution, and more), see our business dissolution checklist. And if you want to understand the financial side, our guide to the cost of closing a business covers fees, professional costs, and hidden expenses.