<prompt> Human: I had no federal income withheld this year because I put exempt on my W4 probably wasnt paying attention or didnt fully understand the meaning, Im now going to pay for it, literally. When I file my taxes, will I be paying a lot in? I only made about 20k this year, and Medicaid and SS were paid, is there a calculator that can tell me what I need to pay? Im also having doubts because I worked 4 jobs total this year, and Im waiting on the last two W2s, I feel like I wouldnt have put exempt on all of them. Also what would be the penalty if I lied on my taxes, and reported a federal withhold? Not that I plan on doing that, just a bit curious.  <response>: Also what would be the penalty if I lied on my taxes, and reported a federal withhold? This is not only wrong, but its stupid. They know what you had withheld. It cant possibly work. edit: one could ask why they you want to you to tell them what they already know, but it has to do with having you also tell them things they dont know. 