<prompt> Human: Hopefully this is the right sub for this. if not, sorry mods! So, I work as a server at a large fast-casual restaurant. I make about half of my money in tips, normally my checks every two weeks are about 800-900 between both tips and my hourly wages. Before recently, Id normally have about 40-70 withheld for federal income tax per check, at least. But for a few paychecks in a row now, however, Ive noticed that for whatever reason theyve been witholding next to nothing out of my checks for income tax. Like, with this most current check I made nearly a thousand dollars and they withheld...9 dollars for federal income taxes.Im a single filer with one job. Ive been filing with 2 allowances on my W-4 since I got the job a year and a half ago. Is that even correct? I asked my GM about this particular issue when I first noticed this happening, and she wasnt much help. She told me that because of my tip wages, its normal for there to be some variance in the amount theyre taking out of my check, and they should readjust the amount being taken out if it seems like theyre not taking out enough, but so far that hasnt happened. Also- stupid question- but the way I understand it is that my tax liability is the same whether or not I pay it all at once or in increments throughout the year? Can I get in trouble if my employer doesnt withhold enough by such a wide margin? I dont really mind paying the difference when I file at the end of the year, but Id rather not have to worry about it. This is my first job, I honestly have zero how taxes work and am freaking myself out a little. Thanks in advance.  <response>: Your GM doesnt know anything about your paycheck other than number of hours to put in and reported tips. Just contact HR, maybe its just a system glitch. 