Throughout the year, a variety of things that affect your income taxes can happen. In the United States, a personal income tax return is a set of forms provided by the Internal Revenue Service (IRS) which most residents are required to complete every year. Most financial transactions and important life events will be entered into your tax return so that you can calculate exactly how much income tax you owe to the federal government.

Typically, you pay some amount of income tax through withholdings (see What is: Withholding) throughout the year, but your withholding amounts are only estimates. After you complete your tax return, you’ll find out how close the total withholding is to your actual tax owed.

Typically, each of your paychecks shows deductions for Social Security, Medicare, federal tax, and state tax. These items amount to your withholding–the portion of your pay that is withheld. These amounts are sent by your employer to the Internal Revenue Service (IRS), an agency of the U.S. government.

At the end of the year, you’ll receive a form that shows the total amounts withheld from you throughout the year. The information on this form will help you complete your tax form, which will determine the size of your tax refund or balance due.

IRS Form 1040 summarizes your tax information for the year—Some numbers come from additional forms called “Schedules”

All Income is everything that you received during the year.  Some income, such as tax-free gifts, is excluded, which is why Total Income can be less than All Income.

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