Mail your amended return to the IRS service center for your state, not to the address on your original return

The mailing address for an amended tax return depends on whether you owe money, are getting a refund, or neither. The IRS publishes a specific list of service centers by state, and using the wrong address delays processing by weeks or months. You will mail Form 1040-X (Amended U.S. Individual Income Tax Return) to a different location than your original return went to, even if you filed electronically the first time.

Do not mail an amended return to a local tax office, a tax preparation company, or the address printed on your tax forms. The IRS sorts amended returns at regional service centers, and mail sent elsewhere gets rerouted, creating delays. The correct address is determined by your state of residence at the time you file the amendment, not where you lived when you filed the original return.

Key Takeaways

  • The IRS publishes a state-by-state list of service center addresses on its website; your state determines which address you use, not your filing status or the amount owed.
  • Form 1040-X must be mailed to the service center address, not to the address on your original return or to a local IRS office.
  • Include a copy of your original return, a statement explaining what changed, and documentation supporting the changes (receipts, corrected forms from employers or financial institutions).
  • Processing an amended return typically takes 8 to 12 weeks from the date the IRS receives it, longer than an original return.
  • If you filed electronically and now need to amend, you must mail the paper Form 1040-X; the IRS does not accept amended returns electronically for individual returns.

How to find the correct mailing address for your state

The IRS maintains a table on its website listing the service center address for each state. Search "IRS Form 1040-X mailing address" or go to irs.gov and look for the amended return instructions. The table shows the address based on your state of residence. If you moved during the year, use your state of residence on the date you file the amendment, not the state where you lived when you earned the income.

Some states have multiple addresses depending on the type of return or the county where you live. The instructions for Form 1040-X include a map showing which address to use. If you live outside the United States, there is a separate address for returns filed from abroad. Double-check the address against the current year's Form 1040-X instructions before you mail, because addresses occasionally change.

What to include with your amended return

Mail Form 1040-X with a cover letter or statement explaining what you are changing and why. The IRS needs to understand which line items on your original return were incorrect and what the correct amounts should be. For example, if you are amending because you received a corrected W-2 from your employer, say so and include a copy of both the original and corrected W-2.

Include copies of any supporting documents: corrected 1099 forms, receipts for deductions you are adding or removing, proof of a life event that changes your filing status, or correspondence from the IRS if you are responding to a notice. Do not send original documents; the IRS will not return them. Keep originals for your own records. If you are amending multiple years, mail each year's Form 1040-X in a separate envelope to the address for that tax year.

Timing and processing after you mail

The IRS typically processes amended returns within 8 to 12 weeks of receipt. This is longer than the 21 days stated for original returns because amended returns require manual review. If you are owed a refund, the IRS will mail a check or deposit it to the bank account you listed on the amended return. If you owe money, the IRS will send a bill with payment instructions.

Do not assume your amendment was received if you do not hear back within three weeks. The IRS does not send a confirmation of receipt for mailed amended returns. If you want proof of delivery, use certified mail with return receipt when you mail the envelope. Keep a copy of everything you send for your records, and note the date you mailed it.

What happens if you mail to the wrong address

If your amended return arrives at a local IRS office or a tax processing center in the wrong state, it will be forwarded to the correct service center. This adds 2 to 4 weeks to processing time. The return is not rejected, but the delay means your refund arrives later or your bill is issued later than it would have been otherwise.

If you realize you mailed to the wrong address before the IRS processes your return, you can contact the IRS at 1-800-829-1040 to ask whether the return has been received and where it is in the queue. Have your Social Security number, the tax year, and the date you mailed ready. If the return has not yet been processed, you may be able to stop it and remail to the correct address, though this is not always possible.

Amended returns filed electronically or through a tax preparer

If you use tax preparation software or hire a tax preparer to file your amended return, they will handle mailing or will tell you where to mail the form. Many tax preparers mail amended returns on behalf of their clients. If you use software, the program will either print the form for you to mail or will file it through an authorized e-file provider. Check with your software or preparer about their process before you print or sign anything.

Some tax preparers charge an additional fee to file an amended return. Ask about this cost upfront. If you file through a preparer, you are still responsible for signing the form; the preparer cannot sign on your behalf. The preparer will mail the signed return to the correct service center address.

Frequently Asked Questions

Can I email or fax my amended return instead of mailing it?

No. The IRS does not accept amended returns by email, fax, or electronic filing for individual income tax returns. Form 1040-X must be mailed on paper to the service center address for your state. This is true even if you filed your original return electronically.

Do I need to mail my amended return certified or overnight?

No, regular mail is fine. If you want proof that the IRS received your return, use certified mail with return receipt. This costs a few dollars more but gives you a tracking number and a signed receipt. Regular mail takes 3 to 7 business days to reach the service center depending on distance.

What if I amended my return but then realized I made another mistake?

You can file another amended return (a second Form 1040-X for the same tax year). Mail it to the same service center address. The IRS will process both amendments, and the most recent one will be the final version on your account. Do not file multiple amendments unless you have made additional changes; filing too many amendments can trigger an audit.

How do I know if the IRS received my amended return?

The IRS does not send a receipt for mailed amended returns. If you mailed with certified mail, you will have a delivery receipt. Otherwise, you can call the IRS at 1-800-829-1040 after 4 weeks to ask whether your return has been received and processed. Have your Social Security number and tax year ready.

Can I amend a return that is currently under audit?

If the IRS has already contacted you about an audit, do not file an amended return without talking to the IRS agent handling your case first. Filing an amendment while under audit can complicate the process. Contact the agent or the IRS office that sent you the audit notice before you mail anything.