<prompt> Human: I assume Im being taxed at the rate of my annual salary, but Ill really only be making half that for the rest of 2018.Is it ok to add a few allowances for the rest of this year? If so, how many?  <response>: You can give your payroll department a dollar amount you want withheld rather than trying to figure out the number of allowances. Do a pro forma for 2018 and figure out your total liability, subtract what has already been withheld, and spread the rest over the remaining pay periods, knowing it will take a while to make the change. 