To file online (using TurboTax tax software) click here . Get an extension: To apply for a 6-month extension to file, click here
◀ Back to Mississippi Tax Forms

TaxFormFinder - Mississippi Mississippi Form 80-320 - Estimated Tax Underpayment Form 2015

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, 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.

You can eFile your Mississippi tax return.

Save time and money by eFiling your tax forms. You can eFile instantly to the Mississippi Department of Revenue through TurboTax or H&R Block .

Is this tax form broken or outdated? Please contact us and let us know. We will update the link as soon as possible.