Vendors Doing Business with Wisconsin

  1. What are the provisions of the law affecting vendors who sell to state agencies and authorities?

  2. What state agencies and authorities are covered by this law?

  3. Does this law affect us if we do not have nexus activity in Wisconsin that would require us to collect and remit sales and use tax with Wisconsin (Nexus)?

  4. How can you require us to register, collect, and remit Wisconsin sales or use tax if we don't have nexus with Wisconsin?

  5. How does the Wayfair decision affect sales and use tax registration requirements for vendors?

  6. Does this law affect us if we are a non-profit corporation or organization?

  7. What should I do if my only Wisconsin activity consists of receiving grants and/or aids from Wisconsin agencies?

  8. How do we register to collect and remit Wisconsin sales and use tax?

  9. How can I find out if the product or service sold by our company is subject to Wisconsin sales and use tax?

  10. Do we have to register if all our sales in Wisconsin will be exempt from sales and use tax?

  11. Who can complete an Affidavit of Exempt Sales?

  12. Why did we receive a request to complete a Registration Verification when we are already registered to collect Wisconsin sales and use tax?

  13. I provided you an affidavit of exempt sales and registration verification before. Why are you asking for it again?

  14. What is an affiliate?

  15. Do we need to complete an Affiliate Registration Verification if we have an affiliate that does not make any sales in Wisconsin?

  16. What does it mean to be "certified"?

  17. What will happen if our company or our affiliate does not register to collect and remit Wisconsin sales and use tax and does not qualify to sign an Affidavit of Exempt Sales?

  18. How will we know if we are on the vendor certification list?

  19. If we are on the vendor certification list, what do we need to do so we can sell goods or services to Wisconsin state agencies and authorities?

  20. Is the information provided by vendors used for any other purpose?

  21. How do we complete the Registration Verification Form (A-001) and Affidavit of Exempt Sales Form (A-006) online?

Applicable Laws and Rules

This document provides statements or interpretations of the following laws and regulations enacted as of October 18, 2023: secs. 16.002, 16.70, 16.71, 73.03, 77.51 and 77.66, Wis. Stats.

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.


Contact Us

​​​MS 2-233
Wisconsin Department of Revenue
PO Box 8906
Madison, WI 53708-8906
Phone: (608) 266-3969
Fax: (608) 266-5464

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

Guidance Document Number: 100029

October 18, 2023