How to File a Mississippi Tax Amendment

amend Mississippi taxes
"The Magnolia State"

If you need to change or amend an accepted Mississippi State Income Tax Return for the current 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 Forms used for the Tax Amendment. You can prepare a 2021 Mississippi 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). 

In case the IRS send you a notification to change an error on your Federal Tax Return, or you might have discovered an error on your own. If you or the IRS amended or changed 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.

Prepare only a MS State Return without an IRS return. Details
Step by Step instructions on how to only Prepare and Download - not eFile - State Returns on
File a 2021 Mississippi Tax Amendment
You cannot eFile a MS 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 MS Form 80-105 (residents) or 80-205 (nonresidents and part-year residents) under My Account. Check the "Amended" box to indicate that it's an amended tax return. 
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 MS Form 80-105 (residents) or 80-205 (nonresidents and part-year residents) - Print, Mail the Form to MS Depart. 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, Change of Address.  Check the "Amended" box to indicate that it's 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
Tax Year 2021 only: Prepare online on until Oct. 15, 2022 Oct. 17, 2022. When done Print, Sign and Mail in - not eFile - Your Tax Amendment, Address Change, etc.
After Oct. 15 Oct. 17 Prepare, Print, Sign and Mail-In - see address above - your Tax Year 2021 - Form 80-105 or 80-205.
How to correct a rejected Tax Return
If your MS Tax Return was rejected by the MS Tax Agency - not - instructions on how to correct a rejected Mississippi Tax Return.
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.
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.