The correct answer is tax return.
Tax returns are filled out by millions of Americans on a yearly basis. This form allows the government to understand your work history, the wages you earned during the fiscal year, and how much you paid in taxes. This will allow the government to assess whether you paid too much or too little in taxes. If you paid too much, you will get a refund. If you paid too little, you are responsible for sending the government the difference that you owe.