<prompt> Human: I worked several jobs last year, a few as a 1099 independent contractor and a few as a W2 employee. At the end of the year I had made 49k as a 1099 and 49k as a W2. I had 7800 federal income tax withheld under my W2s but am expected to pay 11k after deductions for my 1099. How come?  <response>: 1099 workers have to pay self-employment taxes. 