Form4T: Wisconsin Exempt Organization Business Franchise or Income Tax Return (2024)
Wisconsin · Wisconsin DOR · Used for tax years 2024
Wisconsin Form 4T is the business franchise or income tax return for exempt organizations taxable as corporations or trusts. It reports unrelated business taxable income, Wisconsin adjustments, credits, and payments to calculate the tax due or refund.
Who files this form
Form 4T is Wisconsin’s Exempt Organization Business Franchise or Income Tax Return. It has separate sections for exempt organizations taxable as corporations and those taxable as trusts, and reports unrelated business taxable income.
The form does not state filing thresholds or give complete rules for deciding whether an organization must file.
When it's due
For tax year 2024, the printed due date is the 15th day of the 5th month following the close of the taxable year. For certain trusts and IRAs, it is the 15th day of the 4th month following the close of the taxable year.
If you have an extension of time to file, enter the extended due date in item E.
What you'll need
Required attachment: A copy of your federal Form 990-T or Form 4720, including attachments, must accompany Form 4T.
Other forms and schedules depend on your entries:
- Schedule AR: Include it with an amended return.
- Schedule DE: Complete and include it if you are the sole owner of any LLCs.
- Schedule RT: File it if you have related entity expenses and are required to file this schedule.
- Schedule RT-1: Obtain it from the related entity and submit it when claiming the subtraction for income from related entities whose expenses were disallowed.
- Schedule CR: Supplies the nonrefundable and refundable credit amounts.
- Form N and the apportionment schedule used: Supply the applicable corporate income allocation and apportionment entries.
- Form U or Schedule U: Supplies the interest, penalty, and late fee entry on line 36.
How to file
The form refers to electronic filing but does not provide electronic filing steps.
If you are not filing electronically, make your check payable to Wisconsin Department of Revenue and mail your return to:
Wisconsin Department of Revenue
PO Box 8908
Madison WI 53708-8908
Complete the form using black ink. Have the officer or trustee sign and date the return, and include the required federal return and attachments. Paper clip your check or money order in the indicated space. Do not staple or bind the return.
Common mistakes
- Completing the wrong section: Trusts must not fill in lines 1 through 13. Corporations must not fill in lines 14 through 23.
- Using the wrong number format: Do not enter commas or cents. Show negative numbers with a minus sign, such as -1000, not parentheses.
- Forgetting the federal return: Include a copy of federal Form 990-T or 4720 with all attachments.
- Stapling or binding the return: The form says not to staple or bind it. Use a paper clip for your check or money order.
- Missing the annualized-income checkbox: Check the space on line 36 if you annualized income on Form U or Schedule U.
Questions people ask
Where do I get the starting unrelated business taxable income amount?
Corporations use federal Form 990-T, Part 1, line 11, for line 1. Trusts use that same federal line or the attachment to federal Form 4720 for line 14.
Can I apply an overpayment to next year’s estimated tax?
Yes. On line 39, enter the amount of your line 38 overpayment you want credited to 2025 estimated tax. The remaining amount is your refund on line 40.
Can someone else discuss the return with the department?
Yes. In the Third Party Designee section, check Yes and provide the designee’s name, phone number, and personal identification number (PIN).
How do the donations on the form affect my balance?
The endangered resources donation on line 26 and veterans trust fund donation on line 27 decrease your refund or increase the amount owed.