The IRS needs your legal name on file to match your tax returns and Social Security record

When you legally change your name — through marriage, divorce, court order, or any other means — you must notify the IRS so your tax records stay accurate. The IRS matches your name to your Social Security number, and mismatches can delay refunds, cause payment problems, and create confusion on future returns.

You do not need to visit an IRS office or call a phone line to make this change. The process depends on whether you have already filed a tax return under your new name, and whether you need to amend a return filed under your old name.

Key Takeaways

  • If you have not yet filed a return under your new name, send Form SS-4 or a letter to the IRS with your old name, new name, Social Security number, and the date of the legal change.
  • If you already filed a return under your new name but the IRS has your old name on file, the mismatch will likely resolve itself when the IRS processes your return and updates your record.
  • If you filed a return under your old name and now want to file under your new name, you must file Form 1040-X (amended return) to correct the prior year.
  • Always include your Social Security number and the date your name legally changed in any correspondence with the IRS.
  • Keep a copy of your legal name-change document (court order, marriage certificate, or divorce decree) for your records.

Notifying the IRS before you file your first return under your new name

If you have legally changed your name but have not yet filed a tax return under the new name, contact the IRS in writing before you file. This prevents the IRS from creating a mismatch between your name and your Social Security number.

Send a letter or Form SS-4 to the IRS service center that handles your state. Include your old name, your new name, your Social Security number, the date your name legally changed, and a brief explanation (for example, "name change due to marriage" or "name change due to court order"). You do not need to send a copy of your legal name-change document unless the IRS asks for one.

Mail your letter to the IRS address for your state. You can find the correct address on the IRS website under "Where to File" or by calling 1-800-829-1040. Processing takes about four to six weeks.

If you already filed under your new name but the IRS has your old name

If you filed a return using your new legal name but the IRS records still show your old name, the mismatch will usually be caught when the IRS processes your return. The IRS will cross-check your name against your Social Security number and update your file automatically in most cases.

If you are concerned about a delay, you can send a letter to the IRS with the same information listed above — old name, new name, Social Security number, and date of change. Include a copy of your filed return showing your new name. This gives the IRS a clear record to match.

If your refund is delayed or you receive a notice from the IRS about a name mismatch, respond promptly with a copy of your legal name-change document and a letter explaining the change.

Correcting a prior-year return filed under your old name

If you filed a tax return under your old name in a previous year and now want to file under your new name, you must file Form 1040-X (Amended U.S. Individual Income Tax Return) for that prior year. This tells the IRS that the return was filed under a name that is no longer current.

On Form 1040-X, enter your old name and Social Security number in the boxes at the top. In the explanation section, write that you have legally changed your name and provide the date of the change. Attach a copy of your legal name-change document (marriage certificate, divorce decree, or court order).

Mail Form 1040-X to the same IRS address you would use for a regular return. The IRS will update your record and link both years of returns to your current legal name. This is important if you claimed a refund in the prior year or if the IRS needs to contact you about that return.

What to do if the IRS contacts you about a name mismatch

If you receive a notice from the IRS saying your name does not match your Social Security number, respond within the timeframe stated in the notice. Include a letter explaining your legal name change, the date it occurred, and a copy of the document that proves it (marriage certificate, divorce decree, or court order).

Do not ignore IRS notices about name mismatches. These can affect your refund, delay payment of taxes you owe, or create problems when you file future returns. Respond by the important date given in the notice.

Name changes and your Social Security record

The IRS uses your Social Security number as the primary identifier on your tax account. Your name is secondary. If your name does not match what Social Security has on file, the IRS may flag it as a discrepancy.

Before you notify the IRS, update your name with Social Security first. You can do this online at ssa.gov, by mail, or in person at a Social Security office. Once Social Security updates your record, the IRS will eventually sync with that change. However, notifying the IRS directly in writing ensures the update happens faster and creates a clear paper trail.

Frequently Asked Questions

Do I need to file an amended return if I changed my name?

Only if you filed a return under your old name in a prior year and want to correct it. If you have not yet filed under your new name, straightforward notify the IRS in writing before you file. If you already filed under your new name, no amended return is needed — the IRS will update your record when it processes your return.

What if I changed my name but did not update Social Security yet?

Update Social Security first, then notify the IRS. Social Security is the source of your number, and the IRS relies on Social Security's records. Updating Social Security ensures the IRS can match your name to your number without delay.

How long does it take the IRS to update my name?

If you send a letter or Form SS-4, expect four to six weeks. If you file a return under your new name, the IRS will update your record when it processes that return, which usually takes two to four weeks during filing season. If there is a mismatch, the IRS may take longer to resolve it.

Can I change my name on a return I already filed?

You cannot change the name on a return after you file it. You must file Form 1040-X (amended return) for that year. Form 1040-X allows you to correct the name and any other information on the original return.

What documents do I need to send to the IRS?

Send a letter with your old name, new name, Social Security number, and the date of your legal change. You do not have to include a copy of your legal name-change document unless the IRS asks for one, but keeping a copy for yourself is a good idea in case the IRS contacts you later.