You can notify DOR by mail or fax. Steps include:
When completing the form, include:
Note:
Name Change
If you are only changing the business name on your account and your federal employer identification number (FEIN) did not change, provide the following information:
You may call our office at (608) 266-2776 to update your DBA. For legal name changes, fax the above information to (608) 327-0232, ATTN: Registration Unit, email DORRegistration@wisconsin.gov, or mail it to the address below. We will mail you a new Wisconsin Business Tax Registration Certificate when we process your request.
FEIN Change
If a new federal employer identification number (FEIN) is issued to you by the Internal Revenue Service (IRS), you must submit a new Wisconsin Business Tax Registration to DOR.
Note: If you are required to submit a new Business Tax Registration, you should inactivate the previous tax accounts once the new tax accounts are established.
If you have questions on how to update contact information for government officials, contact us at (608) 264-6892 or (608) 266-2569. To sign up for one of the department's email distribution lists, Subscribe to DOR E-News.
This form is only for government entities. Businesses must update their bank information through My Tax Account.
Wisconsin Department of Revenue Customer Service Bureau PO Box 8949 Madison, WI 53708-8949 Phone: (608) 266-2776 Fax: (608) 267-1030 Email: DORBusinessTax@wisconsin.gov