Final return on dissolution

Closing an LLC is not a single step. The state filing ends the company under state law, and the federal filing ends its tax life. Both are needed, and the federal filing is the one owners most often forget. This page explains what to file when the LLC closes, how to mark the return, and what happens if the owner simply walks away.

The final return

File a final return for the final year. The return is the same one the LLC would have filed if it had stayed open: a final Form 5472 with a pro forma Form 1120 for a foreign-owned single-member LLC, or a final Form 1065 for a multi-member LLC taxed as a partnership. The difference is the year it covers and the way it is marked. The final year is the year in which the LLC stopped operating and wound up its affairs, and the final return reports that year.

The final return is due on the same schedule as a return for that year. A Form 5472 is due April 15 of the following year, with an extension to October 15 on Form 7004. A Form 1065 is due March 15, with an extension to September 15. Dissolution does not move the deadline. The return is final because the LLC is closing, not because the calendar changed.

Marking it final

Mark the return as the final return. On the pro forma Form 1120, that means marking the return final in the place the form provides for it. On Form 1065, the final return box is marked. The marking matters: it tells the IRS that the LLC is closing, that no further return is expected for later years, and that the account can be closed once the final return is processed. A return that is not marked final leaves the account open, and an open account can draw a notice in a later year asking where the return is.

File the final return for every year the LLC operated, including the final year. If earlier years were missed, they still need their own filings, starting with the oldest, as the catch-up guide explains. Closing the LLC does not close the earlier years. Each missed year keeps its own penalty exposure until it is filed.

Closing the EIN

Close the EIN account with the IRS. The EIN is the LLC's federal tax identification number, and it stays on the IRS records permanently: the IRS never cancels an EIN and never issues it to another entity. A final return marked as final tells the IRS that the LLC is closing, but it does not close the account. Closing the account is a separate step: a written request to the IRS with the entity's EIN, legal name, address and the reason for closing. Do not reuse the EIN for another entity, and do not leave the account open on the assumption that silence closes it. Silence does not close an account. Only the written request does.

The state filing is separate

The state filing is separate from the federal return. Dissolving the LLC under state law, filing articles of dissolution, cancelling a registration, or letting a registration lapse are state steps, and they do not file a federal return. The federal return is a separate filing with the IRS, and it is still owed even when the state steps are complete. Both closings are needed: the state one ends the company, and the federal one ends its tax life.

If the owner just walks away

Walking away without filing leaves the filing duty and the penalty exposure in place. An LLC that stops operating but never files a final return is still an LLC on the IRS records, and the duty to file continues for every year in which it had a reportable transaction. Each missed Form 5472 carries a penalty of $25,000 per form per year, and the continuation penalty can apply after an IRS notice. The owner who walks away does not escape the duty. The owner only stops being reminded of it, until the notice arrives.

Walking away also leaves the EIN account open, which can cause problems later: a notice asking for a missing return, a penalty for a year the owner believed was finished, or difficulty when the owner forms a new entity and the old one is still on the record. A final return and a closed EIN account are a small amount of work at the end, and they are the only clean ending.

A short checklist

First, settle the LLC's affairs: pay what is owed, collect what is due, and distribute what remains. Second, file the state dissolution step. Third, file the final federal return for the final year, marked as the final return, on the normal schedule for that year. Fourth, close the EIN account with the IRS, with a written request. Fifth, keep the proof of every filing: the fax confirmation or the mailing receipt for the Form 5472, and the record of the state filing. Keep those records for as long as the IRS can ask about the years they cover.

If earlier years were missed, file them as well, starting with the oldest, before or with the final return. A clean ending means every year is filed, the final year is marked final, and the EIN account is closed.

Last reviewed: November 2026. Sources: IRS Instructions for Form 1120