For Kansas individual income tax, if you are unable to file your return by the original deadline, you may request an extension. Kansas does not require a separate extension form. If you have already filed federal Form 4868 with the IRS for an automatic extension, you can attach a copy of that form to your completed Form K-40 to automatically receive an extension for your Kansas return.
Payment for Extension
- To pay any tax balance due while under extension, use the Kansas Payment Voucher (K-40V).
- Mark the box on the K-40V indicating that the payment is for an extension.
- If you do not pay the estimated tax due by the original filing deadline, you will incur interest and penalties on any unpaid balance.
Filing Requirements
- If you receive a federal extension by filing IRS Form 4868, attach a copy of the approved federal extension to your Kansas Form K-40 if required by the Kansas Department of Revenue.
- Include any other supporting forms or documentation required by the Kansas Form K-40 instructions when filing your return.
- Retain copies of your federal return, federal extension, and supporting records for your files, as the Kansas Department of Revenue may request them to verify your return.
Source:
FORM K-40 - 2025 Kansas Individual Income Tax
Disclaimer: Always verify details with the official Federal or State Department of Revenue Forms and Instructions. For complex tax situations, consult a CPA or tax attorney.