How to File a Mississippi Tax Amendment

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If you need to change or amend an accepted Mississippi State Income Tax Return for the 2024 or previous Tax Year, you need to complete Form 80-105 (residents) or Form 80-205 (nonresidents and part-year residents). Forms 80-105 and 80-205 are used for the Tax Amendment. You can prepare a Mississippi Tax Amendment on eFile.com. 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).

If the IRS sends you a notification to change an error on your Federal Tax Return, you might have discovered an error on your own. If you or the IRS amend or change one of your IRS Tax Return(s), the IRS will report this to the Mississippi Tax Agency; thus, you should file a Mississippi Amendment within one year.

Function

Description

Mississippi Tax Deadlines, Forms, Extension, Penalties

Instructions, Resources on how to prepare and e-File Mississippi Tax Returns or how to prepare an Extension and/or previous Year Tax Returns

Prepare, eFile a MS + IRS Tax Return: Detailed eFile.com Service Overview

Start Federal and Mississippi Tax Returns

Prepare only an MS State Return without an IRS return. Details

Step by Step instructions on how to only Prepare and Download - not eFile - State Returns on eFile.com.

File a Mississippi Tax Amendment

You cannot eFile an MS Tax Amendment anywhere except mail it in. However, you can prepare it here on eFile.com.
Option 1: Sign in to your eFile.com account, modify your Return, and download/print MS Form 80-105 (residents) or 80-205 (nonresidents and part-year residents) under My Account. Check the "Amended" box to indicate an amended tax return.
Option 2:If you don't have an eFile.com account, follow the step-by-step instructions on preparing a tax return/amendment.
Option 3: If you want to do the math on your own paper return, then complete and sign MS Form 80-105 (residents) or 80-205 (nonresidents and part-year residents) - Print, Mail the Form to the MS Department of Revenue to:
Refund Tax Amendment
Department of Revenue
Post Office Box 23058
Jackson, MS 39225-3058
No Refund or Including Tax Payment Tax Amendment
Department of Revenue
Post Office Box 23050
Jackson, MS 39225-3050

MS Tax Amendment Forms 80-105 and 80-205
These Forms can be used to file a: Tax Return, Tax Amendment, or Change of Address. Check the "Amended" box to indicate an amended tax return.

Step 1: Download, Complete Form 80-105 or 80-205 for the appropriate Tax Year below.
Step 2:Sign, Mail Form 80-105 or 80-205 to one of the addresses listed above

For 2024 tax year only: Prepare online on eFile.com until October deadline. When done Print, Sign, and Mail in - not eFile - Your Tax Amendment, Address Change, etc.

After October deadline, Prepare, Print, Sign, and Mail-In - see address above - your Form 80-105 or 80-205.

How to correct a rejected Tax Return

If the MS Tax Agency rejected your MS Tax Return - not eFile.com - instructions on correcting a rejected Mississippi Tax Return.

For all Tax Years before the 2024 tax year, Prepare, Print, Sign, and mail in - see address above - your Tax Amendment as soon as possible. If you are a resident, select Form 80-105. For nonresidents and part-year residents, use Form 80-205. You will also file an IRS Tax Amendment Form 1040X.

Check Your MS Tax Amendment Status

1. Call the Mississippi Department of Revenue at (601) 923-7000.
2. Contact the MS Department of Revenue

Mississippi 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 Mississippi 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 Mississippi 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 Mississippi Tax Income Taxes Deadlines

Mississippi Income Tax Penalties

Find out how Mississippi Late Filing and Late Payment Penalties are calculated.
We have an easy-to-use tool for IRS Tax and Late Filing Penalties: The PENALTYucator.

File an IRS Tax Amendment by Tax Year

Instructions on preparing an IRS Tax Amendment on eFile.com. Remember, the IRS does not accept Tax Amendments electronically.

Will I get a bigger tax refund in 2026?

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

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 Tax Refund Calculator to get a high-level understanding of your taxes.

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