Kansas — Irrevocable Election to Pay the Clean Drinking Water Fee
More about the Kansas Form WP-4
We last updated Kansas Form WP-4 in March 2026 from the Kansas Department of Revenue. This form is for income earned in tax year 2025, with tax returns due in April 2026. We will update this page with a new version of the form for 2027 as soon as it is made available by the Kansas government.
Other Kansas Individual Income Tax Forms:
In addition to information about Kansas' income tax brackets, Tax-Brackets.org provides a total of 74 Kansas income tax forms, as well as many federal income tax forms. Here's a list of some of the most commonly used Kansas tax forms:
| Form Code | Form Name |
|---|---|
| Form K-40 | Individual Income Tax Return |
| Form K-40PT | Property Tax Relief Claim |
| Form K-40H | Homestead Claim |
| Schedule S | Individual Income Tax Supplemental Schedule |
| Form K-40V | Kansas Payment Voucher |
View all 74 Kansas Income Tax Forms
Disclaimer: While we do our best to keep Form WP-4 up to date and complete on Tax-Brackets.org, we cannot be held liable for errors or omissions. Is this form missing or out-of-date? Please let us know so we can fix it!
Tax Form Sources:
- Kansas Department of Revenue ( http://www.ksrevenue.org/
) - Department of Revenue Income Tax Forms ( http://www.ksrevenue.org/forms.html )