The answer is "A. W-4".
Form W-4 lets you know, as the business, the conjugal status, the quantity of withholding remittances, and any extra add up to utilize when you deduct government salary charge from the worker's compensation. In the event that a worker neglects to give you a legitimately finished Form W-4, you should withhold government wage charges from his or her wages as though he or she were single and asserting no withholding stipends.
A representative might need to change the quantity of withholding stipends or his or her withholding rate on Form W-4 for any number of reasons, for example, because of marriage, an adjustment in the quantity of wards, or an adjustment in the measure of ordered conclusions or duty credits foreseen for the expense year.