Wis. Stat. § 139.035

(1) All wine shipped directly to an individual located in Wisconsin by a person holding a direct wine shipper's permit under s. 125.535 shall be sold with the occupational tax imposed under s. 139.03 included in the selling price. As directed by the department, the taxes imposed under s. 139.03 shall be paid to, and a quarterly return filed with, the department once every quarter on or before the 15th day of the next month following the close of the calendar quarter. In addition to filing a quarterly liquor tax return, each person holding a direct wine shipper's permit under s. 125.535 shall be required to file an addendum, on forms furnished by the department, that provides, at minimum, the identity, quantity, and price of all wine shipped to individuals in this state during the previous quarter, along with the name, address, and birthdate of each person who purchased the wine as well as the name of the person of legal drinking age who acknowledged delivery of the wine. Working with permittees under s. 125.535 , the department shall develop forms, in both paper and electronic format, for use by such permittees in obtaining this information and complying with any other requirement under this state's law in connection with the direct shipment of wine. The department shall keep confidential, in the same manner required for tax returns under s. 71.78 (1) and (5) to (8) , reports submitted under this subsection, but the department may use aggregated or summary information from such reports for purposes of s. 139.11 (4) (b) .

(2) Any failure of a person holding a direct wine shipper's permit under s. 125.535 to pay the occupational tax or file the addendum required under sub. (1) within 30 days of its due date constitutes grounds for revocation or suspension of the permit. The provisions on timely filing under s. 71.80 (18) apply to the tax and addendum required under this section.

(3) No wine may be shipped directly to an individual in this state by a person holding a direct wine shipper's permit under s. 125.535 unless the tax imposed under s. 77.52 or 77.53 is paid on the sale of such wine.