I just need the amount for the Federal Income tax payable. Martha 3,700 Single Aug. 1st Nov. 30th Has $50/ pay deducted for 401K, $200/pay deducted for Medical Premium insurance, and $150 withheld for FSA. Nothing for Step 3 or 4

Nancy 3,500 Married Sept. 1st - Has $50/ pay deducted for 401K, $350/pay deducted for Medical Premium insurance, and $400 withheld for FSA. Spouse makes the same as her (checked step 2 on W4).

I calculated many times and I get a difference for what the answer should be.