Under a new law effective October 1, 2015, an out-of-state seller may be required to remit sales or use tax on sales into Michigan if the seller has nexus under amendments to the Michigan General Sales Tax Act (MCL 205.52b) and Michigan Use Tax Act (MCL 205.95a). The new law creates a presumption that a seller is engaged in the business of making sales at retail in Michigan if the seller, or another person on the seller’s behalf, engages in certain activities in Michigan.  In addition, a seller will be presumed to be making sales in Michigan if the seller enters into an agreement with one or more Michigan residents under which the resident, for a commission or other consideration, refers potential purchasers to the seller, such as by a link on a website). This is sometimes referred to as “click-through” nexus. If you are a seller that sells into Michigan on or after October 1, 2015, and you are not already registered with the Department of Treasury and remitting sales or use tax, you may need to register for Michigan sales and use tax.