Mississippi State Tax Forms (2026 & 2027 Guide)

Mississippi uses a structured set of state tax forms based on your residency status, income type, and eligibility for deductions or credits.

The primary tax form most taxpayers will use is the Form 80-105.

Understanding which forms apply to your situation can help you file accurately and avoid delays.

Main Mississippi Tax Forms

Mississippi has different primary forms depending on residency.

• Form 80-105 → Resident Income Tax Return
• Form 80-205 → Nonresident or Part-Year Resident Return

These forms are used to report income, calculate tax, and claim deductions or credits.

Common Mississippi Supporting Forms

Depending on your financial situation, you may need additional schedules.

• Schedule A → Itemized deductions
• Schedule B → Interest and dividend income
• Schedule NOL → Net operating loss
• Schedule K-1 equivalents → Partnership or S corporation income
• Credit schedules → Various state tax credits

These schedules help ensure accurate reporting and proper tax calculation.

Forms for Special Situations

Mississippi provides additional forms for specific tax situations.

• Form 80-106 → Income allocation for multi-state taxpayers
• Form 80-320 → Estimated tax payments
• Extension request forms → Additional time to file
• Amended return forms → Corrections to previously filed returns

These forms are useful if you have more complex tax situations.

How Mississippi Taxes Income

Mississippi is transitioning to a simplified tax system.

For 2026 and 2027, the structure generally includes:

• Lower income threshold → 0%
• Remaining taxable income → up to approximately 4.7%

Example: If you earn $50,000, a portion may be taxed at 0%, while the remaining income is taxed at the applicable rate, resulting in a lower effective rate.

Deductions and Special Rules

Mississippi offers both standard and itemized deduction options.

• Standard deduction varies by filing status
• Option to itemize deductions
• Personal exemptions available

These can significantly reduce taxable income.

Who Needs to File

You generally need to file a Mississippi return if you:

• Are a resident with taxable income
• Earn income from Mississippi as a nonresident
• Have state tax withheld and want a refund

Part-year residents must report income earned while living in the state.

Electronic Filing Recommendation 💻

• Use tax software to automatically generate Form 80-105 or 80-205
• Review deductions and exemptions carefully
• Include all required schedules
• E-file for faster refunds and fewer errors

Summary

Mississippi state taxes are filed using Form 80-105 for residents or Form 80-205 for nonresidents and part-year residents, along with supporting schedules based on your tax situation.

Because Mississippi is simplifying its tax system and offers multiple deduction options, understanding the correct forms can help ensure accurate filing and potentially lower your tax bill.