Follow the steps to complete the WI DoR Form I-804 online.

1. Press the ‘Get Form’ button to access the WI DoR Form I-804 and open it in your preferred online editor.
2. Enter the tax year during which the decedent was due a refund by filling in the appropriate fields for the calendar year or other tax year.
3. In the section for the decedent’s name, print or type the decedent’s legal last name, first name, and middle initial.
4. Fill in the decedent’s social security number accurately in the designated field.
5. In the next section, provide your own legal last name, first name, and middle initial, along with your social security number.
6. Input your address, including number and street, apartment number, city or post office, state, and zip code. If applicable, refer to instructions for foreign addresses.
7. Indicate the date of the decedent’s death by filling in the corresponding date.
8. Choose the box that correctly identifies your relationship to the decedent by checking only one box, ensuring to complete Part II as necessary.
9. In Part II, sign and date the form, verifying the claim for a refund of taxes overpaid by or on behalf of the decedent.
10. After completing the form, choose to save changes, download it for your records, print a copy, or share it as required.

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