By TurboTax The W-4 Form is an IRS form that you complete to let your employer know how much money to withhold from your paycheck for federal taxes. In most cases, if you earn money, the IRS expects you to pay taxes on it. Some types of income are specifically excluded from taxation, but when you work as an employee and earn above certain amounts, you’ll almost certainly need to pay taxes on your earnings to the federal government. TurboTax Live experts look out for you. Expert help your way: get help as you go, or hand your taxes off. You can talk live to tax experts online for unlimited answ…