Wis. Stat. § 77.585

(1g) A marketplace provider who collects and remits tax on behalf of a marketplace seller under s. 77.523 may claim a bad debt deduction under this subsection if either the marketplace provider or marketplace seller may claim a deduction under section 166 of the Internal Revenue Code for the sales transaction. A marketplace seller may not claim a deduction under this subsection for the same transaction. (2) If a lessor of tangible personal property or items, property, or goods under s. 77.52 (1) (b), (c), or (d) has reimbursed the vendor for the sales tax on the sale of the property, items, or goods by the vendor to the lessor, the tax due from the lessor on the rental receipts may be offset by a credit equal to the tax otherwise due on the rental receipts from the property, items, or goods for the reporting period. The credit shall expire when the cumulative rental receipts equal the sales price upon which the vendor paid sales taxes to this state. (3) If a purchaser of tangible personal property or items, property, or goods under s. 77.52 (1) (b), (c), or (d) has reimbursed the vendor of the property, items, or goods for the sales tax on the sale and subsequently, before making any use of the property, items, or goods other than retention, demonstration, or display while holding it for sale or rental, makes a taxable sale of the property, items, or goods the tax due on the taxable sale may be offset by the tax reimbursed. (4) A seller may claim a deduction on any part of the sales price or purchase price that the seller refunds in cash or credit as a result of returned tangible personal property or items, property, or goods under s. 77.52 (1) (b), (c), or (d) or adjustments in the sales price or purchase price after the sale has been completed, if the seller has included the refunded price in a prior return made by the seller and has paid the tax on such price, and if the seller has returned to the purchaser in cash or in credit all tax previously paid by the purchaser on the amount of the refund at the time of the purchase. A deduction under this subsection shall be claimed on the return for the period in which the refund is paid. (5) No reduction in the amount of tax payable by the retailer is allowable in the event that tangible personal property or items, property, or goods under s. 77.52 (1) (b), (c), or (d) sold on credit are repossessed except where the entire consideration paid by the purchaser is refunded to the purchaser or where a credit for a worthless account is allowable under sub. (1). (6) A purchaser who is subject to the use tax on the storage, use, or other consumption of fuel may claim a deduction from the purchase price that is subject to the use tax for fuel taxes refunded by this state or the United States to the purchaser that is included in the purchase price of the fuel. (7) For sales tax purposes, if a retailer establishes to the department’s satisfaction that the sales tax has been added to the total amount of the sales price and has not been absorbed by the retailer, the total amount of the sales price shall be the amount received exclusive of the sales tax imposed. (8) (a) A sale or purchase involving transfer of ownership of tangible personal property, or items or property under s. 77.52 (1) (b) or (c), is completed at the time when possession is transferred by the seller or the seller’s agent to the purchaser or the purchaser’s agent. For purposes of this paragraph, a common carrier or the U.S. postal service shall be considered the agent of the seller, regardless of any f.o.b. point and regardless of the method by which freight or postage is paid. (b) 1. Except as provided in subd. 2. , a sale or purchase involving a digital good under s. 77.52 (1) (d) is completed at the time when possession is transferred by the seller or the seller’s agent to the purchaser or the purchaser’s agent or when the digital good is first used, whichever comes first. 2. A sale or purchase of a product transferred electronically, including a digital good under s. 77.52 (1) (d), that is sold by subscription, is completed at the time when the payment for the subscription is due to the seller. For purposes of this subdivision, “subscription” means an agreement with a seller that grants the consumer the right to obtain products transferred electronically from within one or more product categories having the same tax treatment, in a fixed quantity or for a fixed period of time, or both. (10) A retailer who receives an exemption certificate that complies with s. 77.52 (14) after reporting a sale covered by the exemption certificate as taxable, having paid the tax to the department, and having returned to the buyer in cash or in credit all tax previously paid by the buyer, may claim a deduction on the return filed for the reporting period in which the exemption certificate is received, for the sales price or purchase price previously reported as taxable. This subsection does not apply if the reporting period in which the exemption certificate is received is in a taxable year of the retailer that is subsequent to the taxable year of the retailer in which the sale covered by the exemption certificate occurred. For purposes of this subsection, the taxable year of the retailer is the same as the retailer’s taxable year under ch. 71. (11) A marketplace seller may claim as a deduction on a return under s. 77.58 the amount of the sales price for which the marketplace seller received notification under s. 77.523 (2). History: 2009 a. 2 ss. 473, 474, 492; 2009 a. 28, 330; 2013 a. 20, 229; 2015 a. 55 ss. 4750, 9437 (2L); 2015 a. 191; 2017 a. 59 ss. 2265, 9438 (2); 2019 a. 10; 2023 a. 138.