K-120: Corporation Income Tax Return (2024)
Kansas · Kansas DOR · Used for tax years 2024
Form K-120 is the 2024 Kansas Corporation Income Tax Return. It reports federal taxable income, Kansas adjustments and apportionment, tax, credits, and payments to determine a balance due or overpayment.
What you'll need
Have the corporation’s identifying information, federal taxable income, estimated tax payment details, and credit-forward amounts available.
Enclose the supporting documents that apply to your return:
- Schedules for income additions, subtractions, nonbusiness income, and the Kansas net operating loss deduction where marked as required.
- Applicable schedules for Kansas expensing deductions or recapture.
- The credit schedules listed in Part I for credits you claim.
- Schedule K-121 if using the combined income method, or Form K-120AS for the apportionment methods identified on the return.
- A mileage apportionment schedule for the common carrier mileage method, or a letter of authorization and schedule for alternative or separate accounting.
- A separate schedule for other tax payments.
- A detailed explanation if the corporation was involved in a reorganization during the return period.
The form says you do not need to send your entire federal return. It refers to the instructions for the list of required federal forms, but those instructions are not included in the supplied text.
How to file
Complete the applicable return fields and schedules. An officer must sign and enter their title and the date.
Mail the return to:
Kansas Corporate Tax
Kansas Department of Revenue
PO Box 750260
Topeka, KS 66699-0260
If sending a payment, complete Form K-120V and enclose it with your payment. Do not staple the return or submit photocopies of the form.
Common mistakes
- Using this version for an earlier year: The form cannot be used for tax years before 2024.
- Submitting photocopies or stapling the return: Both are expressly prohibited on the form.
- Missing changed information: Mark the taxpayer-information-change box if any taxpayer information has changed since the last return.
- Using the wrong combined-income schedule: Corporations using the combined income method must use Schedule K-121.
- Carrying over the payroll percentage under the elective two-factor formula: Form K-120AS says not to carry that percentage to page 1 when using this formula.
Questions people ask
Can I use this form to amend a 2024 Kansas return?
Yes. Mark the amended 2024 return box and indicate the reason: a Kansas-only change, an IRS adjustment, or an amended federal return.
Do I need to attach my entire federal return?
No. The form says the entire federal return is not required. It directs you to the instructions for the required federal forms.
Can I have an overpayment refunded or applied to next year?
Line 47 lets you request a refund. On an original return, line 48 lets you apply an amount to 2025 estimated tax. That credit-forward amount cannot exceed the total of lines 34, 35, and 36.
Can the department discuss my return with my preparer?
The signature section includes an authorization for the Director of Taxation or the Director’s designee to discuss your return and enclosures with your preparer.