If supplemental wages are paid with regular wages but the amounts of each are not specified, income tax withholdings should be figured as if the total were a single payment for a regular payroll period. If supplemental wages are paid separately or with regular wages and the amounts of each specified, the income tax withholding method depends partly on whether or not income taxes are withheld from the employee's regular wages. If income taxes are not withheld from the employee's regular wages, add the supplemental and regular wages and figure the income tax withholding as if the total were a single payment. Refer to Circulars A and E for more details. Every employer subject to employment taxes must keep all related records available for inspection for at least four years after the due date of the return period to which the records relate.
Important Dates Following is a listing of dates important to Employers.
The listing is not all inclusive and refers to when federal returns are due. 15th of All Months. Deposit any due income, social security, and Medicare taxes. Last Day of All Months. Deposit any due federal unemployment taxes.