Taxes in Watertown, WisconsinList of Companies in Taxes category in the city of Watertown, Wisconsin.Share this page: A Tax Watertown, Taxes; 105 W Main St, Watertown, WI, 53094-7623; (920) 262-9488Nelson`s Income Tax Service Watertown, Taxes; N8632 County Road X, Watertown, WI, 53094-9505; (920) 261-3921