You can file Form 1040-X, the amended individual tax return, electronically through tax filing software. The IRS accepts e-filed amendments for the current tax year and the two prior tax years. If you need to amend a return older than that, you’ll have to file on paper.
Which Tax Years Qualify for E-Filing
The IRS allows electronic filing of Form 1040-X only for recent returns. Specifically, you can e-file an amendment for the current tax year or the two tax years before it. Any return for tax year 2021 or earlier must be amended on paper and mailed to the IRS.
E-filing applies to amendments of Form 1040, Form 1040-SR (for seniors), and Form 1040-NR (for nonresident aliens). If your original return was one of those three types and falls within the eligible window, you can amend it electronically.
Software You’ll Need
The IRS does not offer a way to e-file Form 1040-X directly through its website. You need tax preparation software that supports electronic amended returns. Most major commercial tax software programs (both online and desktop versions) include this feature, though some free-tier plans may not. If you used a tax professional or CPA to file your original return, they can also submit the amendment electronically on your behalf.
You don’t have to use the same software you used for your original return. Any compatible program will work, but having your original return data on hand will make the process faster since you’ll need to reference the figures you’re correcting.
How to Complete the Amendment
Form 1040-X has three columns: the original amount you reported, the net change, and the corrected amount. When you e-file through software, the program typically handles this structure for you. Here’s the general workflow:
- Start with your original return. Import or re-enter the data from the return you’re correcting. Some programs let you pull this in automatically if you filed the original through the same software.
- Make your corrections. Change only the items that were wrong or that you’re updating. Common reasons include unreported income, incorrect filing status, missed deductions or credits, and adding dependents.
- Explain the change. Form 1040-X requires a written explanation of why you’re amending. Keep it brief and specific: “Adding W-2 income from [employer] not included on original return” or “Claiming education credit omitted from original filing.”
- Attach supporting forms and schedules. You must include all forms and schedules affected by your changes, or the IRS will return your amendment. Your software will automatically organize these attachments in the correct order.
Documents and Attachments
The IRS requires you to attach every form and schedule that relates to your correction. If you’re changing income that affects Schedule 1, include the corrected Schedule 1. If you’re claiming a new credit, include the form for that credit. Your tax software handles the assembly, but you should verify that the right forms are included before you submit.
Some situations call for specific attachments. If you’re correcting Additional Medicare Tax, you need a corrected Form 8959 and any updated W-2 or W-2c forms. Net operating loss carryback claims require Schedule A and Schedule B from Form 1045. If you held qualified opportunity fund investments during the year, attach Form 8997. For reportable transactions like certain tax shelters, include Form 8886.
One useful detail: you can attach Form 8379 (Injured Spouse Allocation) to an electronically filed 1040-X even if you aren’t actually changing anything else on the return. This gives injured spouses a way to claim their share of a joint refund without needing to mail paperwork.
Requesting Your Refund by Direct Deposit
If your amendment results in a refund, e-filing lets you receive it by direct deposit. Enter your bank account and routing number on the electronic Form 1040-X, and the IRS will deposit the refund directly. This option is only available for amendments to tax years 2022 and later. Paper-filed amendments send refunds as a check.
If your amendment means you owe additional tax, you can pay electronically through IRS Direct Pay, the Electronic Federal Tax Payment System, or by debit or credit card. Interest on any underpayment runs from the original due date of the return, so filing and paying promptly reduces what you’ll owe in interest.
Processing Time and Tracking
E-filed amendments are generally faster than paper ones, but they still take time. Expect 8 to 12 weeks for the IRS to process your Form 1040-X. In some cases, processing can stretch to 16 weeks.
You can check the status of your amendment using the IRS “Where’s My Amended Return?” tool, available on the IRS website or by calling 866-464-2050. The tool typically shows updates about three weeks after you e-file. It will tell you whether the IRS has received your amendment, whether it’s being processed, or whether it’s been completed.
When You Still Need to File on Paper
Even though e-filing is available for recent tax years, a few situations still require a paper amendment. You must mail your 1040-X if the return you’re correcting is for tax year 2021 or earlier. You may also need to file on paper if you’re amending a return type not supported for e-filing, or if your tax software doesn’t support electronic amendments for your specific situation.
If you’re amending multiple tax years, you can e-file the years that qualify and mail the rest. Each tax year needs its own separate Form 1040-X, whether electronic or paper. Don’t combine multiple years into a single filing.