K-40: Individual Income Tax Return (original and amended) (2024)
Kansas · Kansas DOR · Used for tax years 2024
Form K-40 is the 2024 Kansas Individual Income Tax Return, used for both original and amended returns. It reports income, deductions, exemptions, tax credits, withholding and payments to determine the amount you owe or your refund.
What you'll need
Have your federal income tax return available for the federal adjusted gross income entered on line 1. Use your W-2s and/or 1099s for Kansas income tax withheld on line 20.
Depending on the entries you make, you may also need:
- Schedule S: Enclose it when reporting modifications on line 2. Part-year residents and nonresidents must complete Part B.
- Kansas Schedule A: Complete it if you itemize deductions.
- Other states’ tax returns: Enclose them when claiming the credit for taxes paid to other states.
- Credit schedules: Enclose all appropriate schedules for other credits on line 15.
- Schedule K-9: Enclose it when claiming credit for tax paid on the K-120S.
- Dependent information: Provide each dependent’s name, date of birth, relationship and Social Security number. Enclose a separate schedule if necessary.
How to file
Complete the K-40 with your personal information, filing status, residency status and applicable income, deduction, credit and payment amounts. Sign and date the return. Your spouse must also sign if you file jointly.
Enclose any necessary documents. Do not staple.
Mail the return to:
Kansas Income Tax
Kansas Dept. of Revenue
PO Box 750260
Topeka, KS 66699-0260
Common mistakes
- Do not staple the return or enclosures.
- Enter amounts in whole dollars only. Shade the box for negative amounts.
- Enter the first four letters of your last name in all capital letters. Follow the same direction for your spouse’s last name.
- Mark only one filing status and one residency status. The exemption selection must match your filing status.
- Do not include yourself or your spouse in the dependent count or dependent information list.
- Enter the Total Kansas Exemption Amount on both the front of the form and page 2, line 5.
- For an amended return, mark one amended-return reason and complete lines 25, 26 and 27.
- Donations on lines 36 through 43 reduce your refund or increase the amount you owe.
Questions people ask
Can I use this form to amend my 2024 Kansas return?
Yes. The form has boxes for an amended return affecting Kansas only, an amended federal tax return, or an adjustment by the IRS. Mark one reason and complete lines 25, 26 and 27.
What do part-year residents and nonresidents need to complete?
The residency section directs both part-year residents and nonresidents to complete Schedule S, Part B. Part-year residents also enter their residency dates.
Does my spouse need to sign a joint return?
Yes. The form requires a spouse’s signature and date if you are married filing jointly.
Can I apply an overpayment to next year’s estimated tax?
Yes. Line 35 lets you enter the amount you want applied to your 2025 estimated tax.
What if my name or address changed since last year?
Mark an “X” in the name-or-address-change box on the front of the form.