Questions and Answers for the Additional Medicare Tax: Source: http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Questions-and-Answers-for-the-Additional-Medicare-Tax The following questions and answers provide employers and payroll service providers information that will help them as they prepare to implement the Additional Medicare Tax which goes into effect in 2013. The Additional Medicare Tax applies to individuals’ wages, other compensation, and self-employment income over […]