<prompt> Human: Just wondering why an extra 100 came out of my paycheck for Social Security Tax TSS Its never happened before. Should I expect this in future paychecks as well?Thanks!  <response>: Yeah, I agree asking HR is the best option here. Im not sure what TSS means - if that deduction is exactly 6.2 of gross, then it is the normal Social Security tax and should have been withheld before unless you were a contrator or somehow exempt. Also, are they taking out the 1.45 for Medicare? Those taxes usually go hand in hand. 