Wis. Stat. § 77.523 — Liability of marketplace providers, retailers, and marketplace sellers

77.523(1) (1) A marketplace provider shall collect and remit tax on a sale facilitated on behalf of a marketplace seller, unless the marketplace provider has been granted a waiver under s. 77.52 (3m) (b) .

77.523(2) (2) A marketplace provider who collects and remits tax on a sale under sub. (1) shall notify the marketplace seller that the marketplace provider is collecting and remitting the tax. Only the marketplace provider may be audited and held liable for the tax on the sale. Except for transactions for which a marketplace provider seeks relief under sub. (4) , a marketplace seller shall not be subject to audit or held liable on marketplace provider transactions.

77.523(4) (4) A marketplace provider is relieved of liability under this section for failure to collect and remit the correct amount of tax to the extent that the marketplace provider demonstrates to the satisfaction of the department that the error is due to insufficient or incorrect information given to the marketplace provider by the marketplace seller, except that this subsection does not apply if the marketplace provider and the marketplace seller are related entities, as defined in s. 71.01 (9am) . A marketplace seller that provides insufficient or incorrect information to the marketplace provider may be audited and held liable for the tax if the marketplace provider is relieved of liability under this subsection.

77.523(6) (6) Nothing in this section affects the obligations of a purchaser to remit use tax on a transaction for which the retailer or marketplace provider and marketplace seller did not collect and remit the tax.