<prompt> Human: Four W2s, claimed zero on every W4, and made 28,000.Why do I owe the fed money after all of my weekly withholdings? Its a small amount, and a positive state return. But this isnt clicking for me. Can anyone give me some insight?  <response>: Four W2sThis is your problem. These jobs assumed they were providing all your income, but if they were providing just part of your income, then the assumptions about deductions and exemptions would have been off. 