<prompt> Human: So I just started my first real job this month and Im having a tough time with my US federal tax withholding. After reading through this subreddit and briefly talking with my girlfriends mom a CPA, I decided to use the IRS 2015 Withholding Calculator. It told me the following:- Anticipated income tax for this year: 9,175- Allowances to claim: 0- Additional withholding per paycheck: 433Based on the following information that I provided to the calculator:- Single- 1 job- not 65 or older and no child credits- total salary of 47,047 for this year partial since I started in August- paid monthly- 18,000 in bonuses- total federal tax withheld to date I had a job during my senior year of college from Jan-May in 2015 is 470- no dependents and no one can claim me as one- not blind- no nonwage income- contributing 1,500 to a 401k this year, with a flat 300 per paycheckThe additional 433 seemed very high to me but I followed the calculators instructions on my W-4 anyway. This morning, I got an alert from HR saying that this is really high for new hires and, after asking a few of my fellow new hires, it seems like they didnt put anything for that additional withholding line. Should I still trust the IRS calculator?  <response>: The calculator is only as accurate as the information you put it. It sounds like you probably used it wrong it can be confusing. Id just claim 2 allowances like the w-4 would have a single person with 1 job do and that should be fine.ETA: I take that back. Apparently the calculator does not infer taxes on bonuses put in and its unclear to me what the right way to handle this is. 