South Dakota Personal Tax Extension | No Personal State Income Tax

Modified on Wed, 10 Jun at 2:52 PM

South Dakota Personal Tax Extension Guide

South Dakota Has No Personal State Income Tax

South Dakota does not impose a personal state income tax on individuals. South Dakota residents are not required to file a state income tax return and do not need to request a state extension. There is no South Dakota personal income tax return to extend.

Federal Tax Obligations Still Apply

Although South Dakota has no personal income tax, federal income tax obligations still apply to residents. File IRS Form 4868 by April 15, 2026, to receive a federal extension to October 15, 2026.

Quick Reference Table

State Abbreviation	SD
State Name	South Dakota
Extension Status	No Personal State Income Tax
Other Information	South Dakota has no personal state income tax. No state return or extension required.