You would mail the Louisiana return to Mississippi.
From the Department of Revenue Website:
"If you are a Mississippi resident and earn income from another state, you must include all income on your Resident form. You may be entitled to claim a credit against your Mississippi tax liability for the income taxes paid to the other state. You must include a copy of the other state's return to receive that credit. Please note, credit for taxes paid to other states is the other state's actual tax liability, not the other state's withholding. "
Mailing Address for Department of Revenue
- If you are receiving a refund
P.O. Box 23058
Jackson, MS 39225-3058
- All other income tax returns
P. O. Box 23050
Jackson, MS 39225-3050
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