I have two employees who need to be set up in the payroll area of my Quckbooks Online account. Both employees have mentioned confusion about their W2 forms. What is the best way for their taxes only to be deducted from their check and nothing is witheld in addition from each paycheck? Both are single and will file as head of their households. Is there anything else I need to pay attention to in order to establish them into the system from a tax standpoint so that they pay their taxes as they go but are not having anything in addition withheld?