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CLOSING · FINAL TAX RETURN

File the last return, and close the year for good.

Closing a business is not finished when you stop operating. The IRS and your state still expect one last set of returns, each marked as final, for the year you wind down. Miss them and the IRS keeps expecting filings, which stalls the closure of your account. We prepare and file every final return your entity owes, mark them correctly, and hand owners their final K-1s.

marked final · every return · accuracy verified July 2026
What it is

The last return your business ever files.

A final tax return is the ordinary income or payroll return you file for the year you close, with one difference: it is marked as final, telling the IRS and your state that no more will follow. It matters more than it sounds. Until the final returns are in, the tax authorities keep the account open and keep expecting filings, which is why you cannot cleanly close your EIN or fully dissolve until they are done. Which returns you owe depends on your entity, a corporation files a final 1120, a partnership or multi-member LLC a final 1065, and if you had employees, final payroll returns too. We file the right set, marked correctly.

BosAI I identify every return your entity still owes for its final year, make sure each is marked as a final return, and sequence them so your EIN closure and dissolution can follow cleanly. I help you file accurately; I do not give tax advice. Meet BosAI →
1 year
the final tax year to close out
1 box
the final-return box, checked
0 ends
so the account can close
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What you file

Every final return, marked and filed.

The exact set depends on your entity and whether you had employees. We prepare each one, mark it final, and get owners the documents they need for their own returns.

Your final returnsPrepared, marked final, and filed
  • The final income return. A final Form 1120 for a corporation, or a final Form 1065 for a partnership or multi-member LLC, with the final-return box checked.
  • Final payroll returns. If you had employees, a final Form 941 and annual 940, plus the year-end W-2s.
  • Owner documents. Final K-1s to partners or shareholders so they can report their share on their own returns.
  • A clean handoff to closure. Confirmation the returns are filed, clearing the way for your EIN closure and dissolution.
Who files it

Every business that is closing.

If your company had any tax activity, it owes a final return before it can fully close. What that looks like depends on your entity type.

Files a final return
  • Corporations, which file a final income return and often a plan-of-dissolution notice
  • Partnerships and multi-member LLCs, which file a final return and issue final K-1s
  • Single-member LLCs and sole proprietors, who close out on their final personal return
  • Any business that had employees, which files final payroll returns and W-2s
A different step
  • Closing the IRS account itself, which is the EIN closure that follows the final returns
  • Ending the entity with the state, which is a dissolution
  • Leaving a single state you registered in, which is a withdrawal
  • Businesses that will keep operating, which file ordinary, not final, returns

The final return is one step in a sequence. See how it fits with dissolution and EIN closure in the full wind-down checklist.

The rules that matter

What makes a return truly final.

These points are verified against current IRS guidance. The essentials are marking the return final and doing it in the right order relative to closing your account.

The final return at a glanceVerified against IRS guidance
Accuracy verified · July 2026
Mark it final
You must check the final-return box near the top of the return. Without it, the IRS treats the account as ongoing and keeps expecting filings.
Which returns
A final income return for your entity type, plus final payroll returns and W-2s if you had employees. Corporations may also file a dissolution notice.
When it is due
The final income return is due on the normal schedule for the tax year in which you close, with an extension available like any year.
Owner documents
Partnerships and S corporations issue final K-1s so each owner can report their share on their personal return.
File before you close the EIN
The IRS will not close your business account until the final returns are filed, so this step comes before EIN closure.
State returns too
Your state usually expects a final return of its own, filed alongside the federal ones.

Due dates and forms depend on your entity and tax year. We confirm the exact set and mark each correctly before filing.

How it works

From last day to filed and clear.

  1. 1
    Identify the returns you owe

    We determine the final income, payroll, and state returns your entity still has to file.

  2. 2
    Prepare and mark them final

    We complete each return and check the final-return box so the IRS knows no more will follow.

  3. 3
    Issue owner documents

    Final K-1s go to partners or shareholders for their own returns.

  4. 4
    Clear the way to close

    With the final returns filed, we can proceed to your EIN closure and dissolution.

Why File.Business

An unfiled final return keeps you on the hook.

Businesses that stop operating without filing final returns keep getting notices, and sometimes penalties, for filings the IRS still expects. Marking the last return final, in the right order, is what actually ends the obligation.

Marked correctly

We check the final-return box on every return so the IRS stops expecting more.

The full set

Income, payroll, and state returns, plus owner K-1s, all handled together.

In the right order

Filed before EIN closure and dissolution, so the whole wind-down goes cleanly.

Clear, flat pricing

You see the price before you file, with no surprise add-ons. See pricing →

Questions and references

The final tax return, answered.

What makes a return a final return?

Checking the final-return box near the top of the form. It is the same return you would file for the year, but marking it final tells the IRS and your state that no more will follow, which is what lets your account eventually close.

Which returns do I have to file?

It depends on your entity. A corporation files a final 1120; a partnership or multi-member LLC a final 1065 with K-1s; a single-member LLC closes out on the owner's personal return. If you had employees, you also file final payroll returns and W-2s.

Do I file this before or after closing my EIN?

Before. The IRS will not close your business account until the final returns are filed, so the final return comes first and the EIN closure follows.

Is this the same as dissolving the company?

No. Dissolution ends the entity with the state. The final return closes out the tax year with the IRS. A full closing usually needs both, in the order shown in the wind-down checklist.

What if I already stopped operating months ago?

You still owe the final returns for the year you closed. Filing them now, marked final, stops the IRS from continuing to expect returns and lets you close the account cleanly.

Wind down right.

IRS final + state final + K-1 wind-down + BOI final + dissolution.

Start wind-down today →
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