If you have an additional tax amount deducted from your paycheck, that monthly amount will be split in half, and one-half will be withheld from each biweekly check. If you would like to adjust your additional withholding amount, please go to the At Your Service website and review and/or update your W-4/DE-4 Form. For other tax questions, please consult IRS and State Franchise Tax Board websites or contact a tax professional for help.