Mississippi Form 80-320 - Estimated Tax Underpayment Form
If you underpaid or failed to pay your estimated income tax for the previous tax year, you must file form 80-320 to calculate and pay any interest or penalties due. We last updated the Estimated Tax Underpayment Form in December 1969. You can print this form directly from TaxFormFINDER.org, or download it as a PDF for editing or later use.
Mississippi Department of Revenue Source:
Mississippi usually releases forms for the current tax year between January and April. We last updated Mississippi Form 80-320 in December 1969.
For more Mississippi tax forms, visit our Mississippi tax forms page.