How to File an Amended Louisiana Return

If you need to change or amend an accepted Louisiana State Income Tax Return for the current or previous Tax Year, you need to complete Form IT-540 (residents) or Form IT-540B (nonresidents and part-year residents) Forms IT-540 and IT-540B are Forms used for the Tax Amendment. You can prepare a current Louisiana Tax Amendment on, however you cannot submit it electronically. In comparison, the IRS requires a different Form - Form 1040X - to amend an IRS return (do not use Form 1040 for an IRS Amendment). 

The IRS might send you a notification to change an error on your Return, or you might have discovered an error. If you or the IRS amended or changed one of your IRS Tax Return(s), the IRS will report this to the Louisiana Tax Agency, thus you should file a Louisiana Amendment within one year.

File a current Louisiana Tax Amendment
You cannot eFile a LA Tax Amendment anywhere, except mail it in. However, you can prepare it here on
Option 1: Sign into your account, modify your Return and download/print the LA Form IT-540 (residents) or IT-540 B (nonresidents and part-year residents) under My Account. Check the "Amended Return" box, sign the form, and mail it to one of the addresses listed below.
Option 2: If you don't have an account follow the step by step instruction on how to prepare a tax return/amendment.
Option 3: If you want to do the math on your own paper return then complete, sign LA Form IT-540 or Form IT-540B - Print, Mail the Form to LA Tax Department to:
No Payment Attached Amendment Return:
Louisiana Department of Revenue
P.O. Box 3440
Baton Rouge, La 70821-3440
Payment Attached Amendment Return:
Louisiana Department of Revenue
P.O. Box 3550
Baton Rouge, La 70821-3550
Current tax year only: Prepare online on until the October deadline. When done Print, Sign and Mail in - not eFile - Your Tax Amendment.
After the October deadline, Prepare, Print, Sign and Mail-In Form IT-540 or Form IT-540B
How to correct a rejected Tax Return
If your LA Tax Return was rejected by the LA Tax Agency - not - instructions on how to correct a rejected Louisiana Tax Return.
Check Your LA Tax Amendment Status
1. Call the LA Department of Revenue at 1-855-307-3893.
2. Contact the LA Department of Revenue
Louisiana Refund Deadlines
A. Three years from the due date of the original tax year return, including valid filing extensions.
B. One year from the final determination of the amended federal return or federal change, whichever is later, provided that the allowable refund is not more than the decrease in Louisiana tax attributable to the federal change or correction.
C. Two years from the payment of an assessment, provided the amended return raises issues relating only to the prior assessment and the refund does not exceed the amount of tax paid on the prior assessment.
D. Two years from the filing of an amended Louisiana return resulting in the payment of additional tax, provided that the current amended return raises issues relating solely to the prior amended return and that the refund does not exceed the amount of the tax payment made as a result of the prior amended return.
Additional Louisiana Tax Income Taxes Deadlines
Louisiana Income Tax Penalties
Find out how Louisiana Late Filing and Late Payment Penalties are calculated.
For IRS Tax and Late Filing Penalties we have an easy to use tool: The PENALTYucator.
File an IRS Tax Amendment by Tax Year
Instructions on how to prepare an IRS Tax Amendment on, however the IRS does not accept Tax Amendments electronically.

Will I get a bigger tax refund in 2024?

Many taxpayers can expect a bigger tax refund on their 2023 taxes. To help you keep up with soaring inflation, the IRS is making bigger changes than usual that could save you big money on your 2023 taxes, which is the tax return you'll file in 2024.

Take control of your personal life relationships, finances, and taxes: follow the tips on this page and keep up with tax planning for next year. You can use this free 2023 Tax Estimator to get a high-level understanding of your taxes.