If you worked in Louisiana but Mississippi is your resident state, you'll file a Louisiana nonresident state return. Income gets reported to the state it's earned in. Generally, this means out-of-state workers have to file a return for their work state in addition to their resident state.
Tip: To ensure accurate calculations, always complete the non-resident return first if filing in multiple states because your resident state might give you a credit for any taxes paid in that situation.
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