<prompt> Human: Ive had a part-time job since 2015. I was away from it from December 2016 until 2 weeks ago, and recently changed my W-4 since I had to start paying state taxes up front. I am exempt from federal withholding because I am a full-time student and my dad still claims me as dependent. I dont make enough money to actually owe taxes. In 2015 and 2016 I never head FICA Medicare or Social Security taxed from my checks but now I suddenly do. Its not an outrageous amount but it seems bizarre that Im suddenly paying these, as Im only paying state tax up front and federal is not withheld.  <response>: Students working for their school do not pay FICA taxes. If this condition no longer applies to you, youll start paying FICA taxes on earned income.There is no minimum income threshold for FICA. 