If your amended return cannot be e-filed, you'll need to print, sign, and mail Form 1040-X to the IRS. Before mailing, make sure you've included all required forms and supporting documentation.
What Do I Need to Mail With Form 1040-X?
Include:
- Form 1040-X
- Any new or corrected federal forms and schedules related to the amendment
- Supporting tax documents that explain or verify the changes being made, when required
Examples may include:
- Form W-2
- Form 1099
- Schedule K-1
- Credit-related forms and schedules
- Additional schedules affected by the amendment
Only include documents that support the changes made on the amended return.
Do I Need to Sign Form 1040-X?
Yes. If you're filing a paper amended return, Form 1040-X must be signed before mailing. For Married Filing Jointly returns, both spouses must sign if required by IRS instructions. Unsigned returns may be delayed or returned by the IRS.
If filing electronically, the PIN or AGI will be used as a signature.
Where Do I Mail Form 1040-X?
The correct mailing address depends on:
- Your state of residence
- Whether a payment is included
- The tax year being amended
Because IRS mailing addresses can change, always use the address listed in the most current Form 1040-X instructions or IRS guidance.
Tips Before Mailing
Before sending your amended return:
- Verify all changes are complete and accurate
- Verify the Original Return Information is complete in the program (Report any refunds received or payments made with or after the original return was processed).
- Attach all required forms and schedules
- Sign the return where required
- Keep copies of everything you mail for your records
Consider using a mailing method that provides delivery confirmation if you would like proof that the IRS received your return.
What Happens After Mailing?
After the IRS receives your amended return:
- The return is entered into IRS processing.
- The IRS reviews the changes and supporting documentation.
- Any additional refund or tax due is determined.
Processing times for amended returns are typically longer than for original tax returns (up to 16 weeks).
You can monitor the status of your amendment using the IRS Where's My Amended Return? tool.