Form 966, Corporate Dissolution or Liquidation, reports a corporation's adoption of a resolution or plan to dissolve or liquidate all or part of its stock. The filing is separate from state dissolution documents and the corporation's final federal income tax return.

Flat illustration of an office building packed into a folder, representing IRS Form 966

Key Takeaways

  • A corporation generally files IRS Form 966 after adopting a resolution or plan to dissolve or liquidate all or part of its stock.
  • The form is due within 30 days after the corporation adopts the resolution or plan, not 30 days after operations end.
  • A new Form 966 is due within 30 days after adopting an amendment or supplement to the original plan.
  • The filing must include a certified copy of the resolution or plan and any amendments not previously submitted.
  • Form 966 is mailed separately to the IRS service center where the corporation files its income tax return.
  • Filing the form does not dissolve the corporation under state law or replace its final Form 1120 or Form 1120-S.

What Is IRS Form 966 and Who Must File It?

IRS Form 966 is an information return used when a corporation adopts a resolution or plan to dissolve or liquidate any of its stock. It gives the IRS details about the corporation, the adopted plan, the intended tax treatment, its outstanding shares, and its final or prior federal returns.

The federal rule applies broadly to corporations, including a farmer's cooperative. The corporation should evaluate its federal tax classification and the substance of the transaction rather than relying only on the entity's state-law label. A sale of assets, ownership change, or closure of one location does not automatically constitute a complete or partial liquidation.

Entity or transaction General filing position
C corporation Generally files after adopting a resolution or plan for dissolution or liquidation of all or part of its stock.
S corporation S status does not by itself remove the corporate reporting rule. An S corporation should file if it adopts a covered dissolution or liquidation plan.
LLC taxed as a corporation May have a filing obligation because it is classified as a corporation for federal tax purposes. Its election history and liquidation transaction should be reviewed.
LLC taxed as a partnership or disregarded entity Generally does not use Form 966 because the form applies to corporations. Other federal and state closing filings may apply.
Foreign corporation The federal regulations provide an exception for a foreign corporation that was not engaged in a U.S. trade or business at any time during the tax year.
Complete or partial liquidation Either may trigger filing if the corporation adopted a resolution or plan covered by the reporting rule.

The IRS instructions state that Form 966 should not be filed for a deemed liquidation resulting from a Section 338 election. If your transaction involves a merger, subsidiary liquidation, conversion, or restructuring, obtain tax advice before deciding that the form does or does not apply.

Form 966 Due Date and the 30-Day Rule

The Form 966 due date is 30 days after the corporation adopts the resolution or plan to dissolve or liquidate. The adoption date controls. The countdown does not begin when the corporation stops operating, files state dissolution documents, distributes its last asset, or submits its final income tax return.

Use the date on which the corporation took the action required to adopt the plan under its governing documents and applicable state law. Depending on those requirements, that may involve directors, shareholders, or both. Keep minutes, written consents, voting records, and the signed resolution together so the corporation can support the adoption date reported on the form.

If the corporation later adopts an amendment or supplement to the plan, it must file another Form 966 within 30 days after adopting that change. The additional form identifies the date of the earlier filing and reports the amendment dates. A new filing is not required merely because the liquidation takes longer than originally expected, provided the corporation has not actually amended or supplemented its plan.

A corporation that discovers an overdue filing should generally submit Form 966 as soon as possible rather than wait for the final return. The Internal Revenue Code does not state a specific penalty solely for failing to file Form 966, and filing the form is not itself a condition for receiving liquidation tax treatment. Late filing can still create a recordkeeping and compliance issue, especially if the reported dates conflict with corporate minutes, state filings, or tax returns.

Do not confuse this 30-day deadline with a return deadline for a business or shareholder. A shareholder may ultimately report liquidation-related items on an individual 1040 tax form, but that return does not replace the corporation's Form 966 filing.

Official Form 966 Instructions, PDF, and Download

Use the IRS version of the form instead of a third-party template or Form 966 sample. The IRS provides a free Form 966 information page and the official Form 966 PDF. The PDF contains both the filing form and its instructions.

Review the current PDF before preparing the filing, even if the corporation used Form 966 in an earlier transaction. A saved copy may not reflect the version currently posted by the IRS. The official form also provides the exact field labels, signature declaration, attachment rule, and filing location standard.

Before completing the 966 form, gather the following records:

  • The corporation's legal name, mailing address, and employer identification number.
  • The date and place of incorporation.
  • The adopted resolution or liquidation plan and a certified copy for attachment.
  • The formal adoption date and dates of any amendments or supplements.
  • The ending date of the last tax year for which a return was filed.
  • Details concerning the final return, if it has already been filed.
  • Information about any consolidated return and the parent corporation.
  • The number of common and preferred shares outstanding when the plan was adopted.
  • The Internal Revenue Code section under which the dissolution or liquidation will occur.

Confirm the legal name and EIN against IRS records. If the corporation previously changed its name or address, review the rules for an IRS business name or address change so the information used across closing filings remains consistent.

How to Fill Out Form 966

Start by entering the corporation's name, address, and EIN at the top of the form. Use the legal entity information associated with its federal tax account, not a trade name used only for marketing.

  1. Line 1, incorporation date: Enter the date the corporation was incorporated.
  2. Line 2, place of incorporation: Identify the state or country under whose law the corporation was formed.
  3. Line 3, type of liquidation: State whether the plan provides for a complete or partial liquidation.
  4. Line 4, adoption date: Enter the date the resolution or plan was formally adopted. This is the date that starts the 30-day filing period.
  5. Lines 5 and 6, prior return: Identify the IRS service center where the immediately preceding income tax return was filed and enter that return's tax-year ending date.
  6. Line 7, final return information: Enter the date the final return was filed, if applicable. If it was part of a consolidated return, provide the requested parent corporation name, EIN, and filing location.
  7. Line 8, stock information: Report the total outstanding common and preferred shares when the resolution or plan was adopted.
  8. Line 9, amendments: Enter the adoption date of each amendment or supplement to the plan.
  9. Line 10, Code section: State the Internal Revenue Code section under which the dissolution or liquidation will occur. This determination can materially affect the corporation and its shareholders.
  10. Line 11, earlier filing: If this filing reports an amendment or supplement, enter the date the corporation filed its earlier Form 966.

An authorized corporate officer must sign and date the form and provide the officer's title. Do not leave the signature section blank or assume that a tax preparer's work on the form replaces the required corporate authorization.

The distinction between a complete liquidation, partial liquidation, and ordinary asset disposition can be technical. For background on transactions that function as liquidations without a formal label, review de facto liquidation rules, then confirm the federal tax result with a qualified tax adviser.

Where to File Form 966 and the Mailing Method

File Form 966 with the IRS service center where the corporation files its federal income tax return. There is no single Form 966 mailing address that applies to every corporation. The correct service center can depend on the return type, the corporation's location, and the IRS instructions in effect when the form is mailed.

Check the current mailing instructions for the corporation's Form 1120, Form 1120-S, or other applicable corporate return. If the immediately preceding return was filed electronically, use the service center identified under the current IRS filing instructions rather than sending Form 966 to an electronic return provider or software company.

The Form 966 instructions direct corporations to file with the applicable IRS service center and do not provide a standalone electronic filing procedure. Do not attempt to submit it through the Electronic Federal Tax Payment System, which is a payment system rather than a method for transmitting this form. Mail the signed paper form with its required attachment.

Keep a complete copy of the signed form, certified plan, amendments, and mailing materials. Consider using a mailing method that provides evidence of timely dispatch and delivery. That documentation can help establish what the corporation sent and when it was sent if IRS records do not reflect the filing.

Form 966 is filed separately. Do not attach it to Form 1120 or Form 1120-S as a substitute for sending it to the designated service center. The corporation may still need to disclose liquidation-related information on its income tax return, but those disclosures serve different purposes.

Required Attachments, Amendments, and State Dissolution

Attach a certified copy of the adopted resolution or plan of dissolution or liquidation to federal Form 966. If the corporation is reporting an amendment or supplement, include a certified copy of each change that was not previously filed. The certification should follow the corporation's records and authorization procedures rather than relying on an unsigned draft.

The plan should match the corporate approvals and transaction the corporation intends to carry out. If the documents use inconsistent dates, describe a transaction differently, or omit required authorization, resolve those issues before filing. Do not report an anticipated approval date as though adoption has already occurred.

If the company is unsure whether its transaction is a complete or partial liquidation, lacks a properly adopted plan, amended the plan, or needs to coordinate federal notice with state dissolution, you can post your legal need on UpCounsel's marketplace. Responses typically arrive within a day. An attorney can prepare or review resolutions, confirm who must authorize them, verify entity status, and coordinate Form 966 with the tax adviser and the broader winding-up process.

Filing federal Form 966 does not terminate the entity under state law. A corporation generally must complete separate filings with the agency responsible for business entities in its formation state. It may also need to address creditors, contracts, licenses, taxes, employees, and asset distributions under applicable law. Review a practical notice of corporate dissolution before setting the state-law timeline.

State approval rules may differ from federal tax rules. Confirm the required board and shareholder actions, certificates, notices, tax clearances, and fees using current instructions from the corporation's formation state. A federal filing cannot cure a defective state dissolution, and a state dissolution certificate does not satisfy the federal Form 966 requirement.

Final Returns and Common Filing Mistakes

Form 966 notifies the IRS of the adopted dissolution or liquidation plan, but it does not serve as the corporation's final income tax return. A C corporation generally files Form 1120, while an S corporation generally files Form 1120-S. The corporation should mark the appropriate final-return box and follow the current instructions for the short tax period and filing deadline.

S corporations should also mark final Schedules K-1 as required and provide them to shareholders. The timing of an S corporation's final return is separate from the 30-day Form 966 deadline. For more detail, review the S corporation return due date and filing requirements.

Other filings may apply based on the corporation's activities. These can include employment tax returns, information returns, and forms reporting business property sales, asset acquisitions, or shareholder distributions. A corporation also must address unpaid federal taxes before the IRS will close its business account. Closing an EIN account does not cancel the EIN, which remains permanently associated with the entity.

Common Form 966 mistakes include:

  • Counting 30 days from the state dissolution date instead of the plan's adoption date.
  • Treating an operating shutdown or asset sale as proof of a complete liquidation without reviewing the adopted plan.
  • Failing to attach a certified copy of the resolution or plan.
  • Omitting a later amendment or missing the separate 30-day deadline for that amendment.
  • Using stock figures from a different date than the plan's adoption date.
  • Guessing the applicable Internal Revenue Code section.
  • Mailing the form to an outdated or unrelated IRS address.
  • Attaching Form 966 only to the final corporate return.
  • Assuming the federal filing completes state dissolution.

Reconcile the form with the corporation's minutes, stock ledger, prior returns, final return, state filings, and liquidation records. Retain those documents after dissolution because the IRS may still examine a dissolved corporation's returns.

Frequently Asked Questions

Where Do I File Form 966?

File Form 966 with the IRS service center where the corporation files its federal income tax return. Because the applicable address can change based on return type and location, consult the current IRS instructions for the corporation's income tax return before mailing it rather than relying on an old Form 966 mailing address.

When Do I File Form 966?

File Form 966 no later than 30 days after the corporation formally adopts its dissolution or liquidation resolution or plan. If the thirtieth day presents a federal filing-calendar issue, confirm the applicable timely filing rules with a tax professional and preserve proof of mailing.

Is Form 966 Required for an S Corporation?

Yes, an S corporation may be required to file Form 966 when it adopts a covered resolution or plan to dissolve or liquidate its stock. The S election changes the corporation's tax treatment, but it does not convert the business into a noncorporate entity for this federal reporting rule.

When Is Form 966 Required?

Form 966 is required when a corporation adopts a resolution or plan for dissolution or for liquidation of all or part of its stock, subject to limited exceptions. The form is not triggered merely by poor financial performance, inactivity, a business name change, or an informal intention to close.

Does Form 966 Need to Be Attached to Form 1120?

No, Form 966 should not be attached to Form 1120 as the method of filing it. Send Form 966 and its certified attachment separately to the applicable IRS service center, then file Form 1120 under its own instructions and mark it as final when appropriate.

Can Form 966 Be Filed Electronically?

No standalone IRS electronic filing method is identified in the Form 966 instructions. Prepare the current paper PDF, obtain the authorized officer's signature, attach the certified resolution or plan, and mail the package to the proper IRS service center while retaining evidence of timely mailing.