Any business that sells goods or taxable services within the state of Wisconsin to customers located in Wisconsin is required to collect sales tax from that buyer. This will include all online businesses. Any seller which conducts business and has a major presence within the state must collect sales tax in Wisconsin must pay taxes to the state. Therefore, these sellers required to file for a Sales tax certificate. By not doing so the business may face sanctions or other types of penalties. Additionally, depending on the businesses location and tax jurisdiction, localities such as counties, cities, and other districts can also add additional sales and use taxes.