1. What should I do if I need to make a change to my business tax account(s)?

   To make a change, submit your request using one of the following methods:

   • Email DORRegistration@wisconsin.gov
   
   
   • Fax (608) 327-0232, ATTN: Registration Unit
   
   
   • Call (608) 266-2776 (except for a legal name change because we require a copy of the Articles of Amendment)
   
   
   • Mail:
     
     Wisconsin Department of Revenue
     ATTN: Registration Unit
     PO Box 8902
     Madison, WI 53708-8902
     
     

   Name Change

   If you are only changing the business name on your tax account and your Federal Employer Identification Number (FEIN) did not change, provide the following information:
   

   • The current business name on your account
   • Your tax account number
   • Your new legal or "doing business as" name (DBA)
   • The date you want the change to take effect
   • A copy of the Articles of Amendment (required for legal name changes only)
   
   

   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 send you a new Wisconsin Business Tax Registration Certificate when we process your request.

   Wisconsin Department of Revenue
   ATTN: Registration Unit
   PO Box 8902
   Madison, WI 53708-8902

   Address Change

   To change an address, contact our Customer Service Bureau at (608) 266‑2776 or email DORRegistration@wisconsin.gov and provide the following information:

   • The current business name on your account
   • Your tax account number
   • The date you want the change to take effect
   • The business mailing address currently shown on your account
   • The new business mailing address
   
   

   Change in Entity Type

   Generally, a change in entity type requires you to submit a new Wisconsin Business Tax Registration. If a new FEIN is issued to you by the Internal Revenue Service (IRS), you must submit a new Application for Business Tax Registration to DOR.

   Note: If you are a sole proprietor changing to a single member LLC that is disregarded, you do not need to submit a new application. However, you will still need to notify us of the change and provide your new business name.

   Note: If you sell your business, your seller's permit is NOT transferable to the buyer. You should surrender your seller's permit to us and close your sales and use tax account.

   Reactivate your Tax Account

   To resume doing business under a currently inactive tax account, please submit the following information via email to DORBusinessTax@wisconsin.gov, call our office at (608) 266-2776, or fax us a written request at (608) 267-1030:

   • The business name of your inactive account
   • Your tax account number
   • The date you want the reactivation to take effect
   • The business and mailing address you will be using
   
   

   You may submit a request to reactivate an account in My Tax Account. We will mail you a new Wisconsin Business Tax Registration Certificate after your account has been reactivated.

   Inactivate your Tax Account

   Please submit the following information via email to DORBusinessTax@wisconsin.gov , call our office at (608) 266-2776, or fax us a written request at (608) 267-1030:

   • The current business name on your account
   • Your tax account number
   • The business mailing address on your account
   • The date you want the inactivation to take effect
   
   

   You may submit a request to close account in My Tax Account.

   Add Additional Business Location(s)

   If you are adding an additional location(s) from which you are making taxable sales, leases, or rentals, you should inform our office via email to DORBusinessTax@wisconsin.gov, call our office at (608) 266‑2776, or fax us a written request at (608) 267‑1030.

   Note: If you are engaged in business at more than one location using the same FEIN, you will use the same tax account number for each additional location. However, you will receive a separate seller's permit for each location. You must file one consolidated return that includes the information and figures for all your business locations. There is no fee to add additional business locations.

   Add a FEIN to Your Tax Account

   Taxpayers can submit a request to add a FEIN to their account if we do not currently have that number on record. Taxpayers can provide us a copy of their IRS letter. The letter may be faxed to our Registration Unit at (608) 327-0232 or mailed to:

   Wisconsin Department of Revenue
   Registration Unit
   PO Box 8902
   Madison, WI 53708-8902

Applicable Laws and Rules

This document provides statements or interpretations of the following laws and regulations enacted as of November 13, 2024: secs. 73.03 and 77.52, Wis. Stats., and sec. Tax 11.002, Wis. Adm. Code.

Laws enacted and in effect after this date, new administrative rules, and court decisions may change the interpretations in this document. Guidance issued prior to this date, that is contrary to the information in this document is superseded by this document, according to sec. 73.16(2)(a), Wis. Stats.

The department welcomes your input on our guidance. Submit comments on this guidance document.

Guidance Document Number: 100073

November 13, 2024