The employer must have upgraded to the new withholding system and automatically choose married for you ... there are no more allowances like before. If you are married and only one of you work then the only thing you have to fill in on the new W-4 form is the filing status of married and leave the rest of the form blank. The employer has already done this for you. Personally if you did use M-6 allowances on the old system then you really should have been owing since you do not have 4 kids/dependents to claim.
