Find out what credits you need:
          WI Department of Commerce

Department of Labor & Industry: http://dwd.wisconsin.gov/default.htm

Wisconsin Code Information:
http://www.commerce.state.wi.us/SB/  

Need a License:
http://www.contractors-license.org/wi/Wisconsin.html

Workers Compensation:
http://dwd.wisconsin.gov/wc/

Independent Contractor Information:
http://dwd.wisconsin.gov/wc/employers/independent_contractors.htm

Department of Commerce:

View consumer info and publications. Contains guidelines for residential building contractors, real estate agents, and financial institutions. http://www.commerce.state.wi.us/

City of La Crosse Building Codes and Permits:
http://www.cityoflacrosse.org/index.aspx?NID=626