LINKS Internal Revenue Service Wisconsin Department of Revenue Wisconsin Department of Workforce Development Department of Financial Institutions The US Department of Labor Social Security Administration Wisconsin Employer’s Withholding Tax Guide Publication 15 (Circular E), Employer’s Tax Guide Department of Labor Poster Wisconsin Sales Tax Rate Chart Mileage Rates—HistoricalIRS Tax Benefits for EducationIRS Retirement Plan NavigatorNon-Cash Donation Value GuideUS Department of Labor Overtime Update