How to Close a Corporation With the IRS

Where This Fits in the Dissolution Process

Closing a corporation with the IRS is the federal tax side of dissolving it, separate from the state-level process of winding up the business and filing a Certificate or Articles of Dissolution with your state's filing office. Our guide on how to dissolve a corporation covers the full state-level sequence, including the board and shareholder approvals that come before any of the IRS steps described here, since a dissolution resolution has to exist before Form 966's deadline can even start running.

Step 1: File Form 966 Within 30 Days

Once the board of directors adopts a resolution, or the board and shareholders adopt a formal plan, to dissolve the corporation or liquidate its stock, the corporation has 30 days from that adoption to file Form 966, Corporate Dissolution or Liquidation, with the IRS. This deadline is easy to miss because it runs from the date of the internal resolution, not from any later state filing or the date winding up finishes, and it's separate from and earlier than the corporation's final tax return.

Step 2: File a Final Form 1120

A C corporation reports its income and deductions through the date it stops operating on its regular Form 1120, U.S. Corporation Income Tax Return, but checks the box indicating it's a final return. An S corporation does the same on Form 1120-S and issues a final Schedule K-1 to each shareholder showing their last share of income, deduction, and credit items. The return is due by the standard deadline, the 15th day of the fourth month after the corporation's final tax year ends, unless the corporation requests an extension.

Step 3: File Final Employment Tax Returns

If the corporation had employees, it needs to close out its payroll tax obligations too. This means a final Form 941 (quarterly) or Form 944 (annual), a final Form 940 for federal unemployment tax, final W-2s issued to every employee by the applicable deadline, and any Form 1099-NEC required for independent contractors paid during the final year. Each of these forms has its own final-return indicator to check.

Step 4: Report Any Asset Sales or Liquidating Distributions

If the corporation sells assets or distributes remaining property to shareholders as part of winding up, that activity generally has its own tax reporting, including Form 1099-DIV for liquidating distributions to shareholders above a certain threshold. How these distributions are taxed to shareholders depends on the details, generally treated similarly to a sale of their stock, so this is worth reviewing with a tax professional rather than assuming it's a simple asset transfer.

Step 5: Send a Written Request to Close the Business Account

The IRS states plainly that it cannot close a business account until all required final returns have been filed and all taxes owed have been paid in full. Once that's done, send a letter to the IRS including the corporation's complete legal name, EIN, business address, and the reason for closing the account, along with a copy of the notice the IRS originally sent when the EIN was assigned, if you still have it.

The EIN Itself Is Never Reused

An important distinction: the IRS does not cancel, delete, or reassign an EIN once it's been issued to a corporation, even after the account is closed. The number stays permanently associated with that corporation in IRS records; the IRS simply closes the account tied to it, so there's nothing further to do with the number itself beyond the closure request.

Keep Records After Closing

The IRS recommends keeping business records, including final tax returns, Form 966, and supporting documentation, for at least the standard record-retention period after closing, generally a minimum of three years, since the IRS can still examine a closed corporation's prior returns within that window and longer in cases involving unreported income or no return filed at all.

Don't Wait for the State Filing to Start the Form 966 Clock

Because Form 966's 30-day deadline runs from the resolution to dissolve, not from your state filing or the completion of winding up, it's entirely possible to miss this federal deadline while you're still in the middle of closing out the business at the state level. Calendar the deadline the same day your board or shareholders adopt the resolution.

Confirm All State and Local Tax Accounts Are Also Closed

Closing with the IRS doesn't close your state income tax, sales tax, or employer withholding accounts; those are separate closures with your state's revenue and labor agencies. Leaving a state account open after the business has stopped operating can generate penalty notices for returns that technically still have to be filed.

A Corporation With Appreciated Assets Needs Extra Care

If the corporation is distributing property, rather than just cash, to shareholders as part of winding up, the tax treatment of that distribution can get complicated, and it's worth a tax professional's review before you distribute anything, not after.

This Is Not Tax Advice

Closing a corporation's federal tax obligations correctly depends on your specific situation, including whether the corporation has employees, holds appreciated assets, or has any outstanding tax issues. Talk to a tax professional before filing your final returns.