<prompt> Human: I am checking my withholdings, and my paystub lists Federal Withholding, Fed MED, and Fed OASDI. My wifes lists FICA Withheld and Federal Medicare. Would these be added to Federal Income Tax Withholding in the IRS W-4 calculator? The calculator just says Enter the total Federal income tax withheld to date in 2018Thanks!  <response>: No, they are not part of the federal income tax withholding that the calculator needs to know about. Only enter the line that is federal income taxes, or FIT. Leave the rest off the calculator.If your wife makes a small amount, she may not be having any FIT withheld. I couldnt tell if that was what was going on with your question, or not. 