<prompt> Human: I just received my last W2 today and I noticed that the federal withholding was extremely low about 9 when it should have been a couple hundred. My third W2 is completely normal, I worked there about two months last winter and I have a fair withholding. Im only claiming myself, so I would have claimed a 1 or a 0 and I dont know what else could have went wrong. I was working for a brand new small business and the owners were completely new to having employees. Will this effect my taxes when I file? Is there any way for me to fix this, or will I have to pay out to make up for whatever mistake happened? I was planning on filing on my own this year but I wont if this has over complicated things.  <response>: Sounds like either you filled out W-4 and wrote exempt by mistake, or the new employer screwed up withholding. Id check your pay checks to confirm that not more went out to withholding. Then, the reality is if you havent paid in the federal tax you owe, youll just owe. You can still file your taxes on your own. You need to sum all your W-2 wages to figure out your tax, and sum all your withholding to find out how far you fall short.If its just a couple hundred dollars of under-withholding, you wont get hit with any underpayment penalty. Youd need to have a gap of 1000 for that to become an issue. 