The amount withheld from your pay is reported to you on Form W-2. That amount is determined by two things: how much you are paid and the information you provide your employer on the Form W-4, Employee's Withholding Allowance Certificate. The interview will help you put all the numbers from your W-2 form in the proper place on your return.
For help making adjustments in how much is taken out of your pay check, see the advice for Withholding Allowances. For help making adjustments in how much is taken out of your pay check, select the following for advice on Adjusting Your Withholding: Help, Tax Tips and Advice, Personal Information, Withholding Allowances.