<prompt> Human: I normally get gross wages of 576 per week and with that my Federal Withholding is always 63.55 and including SS and Medicare its 94.28 and this is with me always getting exactly 40 hours a week.But this week I received literally just 5.40 more in my gross wages and my federal withholding shot up to 131.50. I live in Texas. Can someone explain this to me? Might this have been a payroll error?  <response>: Have you contacted your payroll department? I doubt anyone here can explain this... 