During the monthly report to the Sheridan City Council on the latest sales and use tax numbers for the City, Treasurer Karen Burtis said that for the month of March, the City experienced a significant increase in sales and use tax when compared to last year. Karen Burtis Burtis said the monthly internet tax is up 49.8 percent or $12,841, and the year-to-date internet tax is up 42.7 percent, or $112,993, over this time last year.