Where to get a business license in sumner county?

There are several Sumner Counties in the United States so I can't answer your question directly and not all counties require business licenses. For your specific county, you can locate either contact information or a direct link using the free website "Business License Records Resources." From the main page, click on your state and then scroll down to Sumner County, where you'll find a link under "Business Licenses." If there isn't a "Business License" link, you can click on the County's main page to locate the Licensing Office.