How do you know if you have to file a tax return?

Those who earn more than a certain amount of money must file a tax return; a return must be filed regardless of whether a refund is expected or tax is due. The amount of money that can be made before it becomes mandatory to file an income tax return varies based on the filing status, type of income and age of the taxpayer, according to the IRS.

Even when they are not required to, some taxpayers may want to file a return anyway, especially if they have had federal income tax withheld from their paychecks. In addition, taxpayers may qualify for a refundable credit, such as the Earned Income Credit or Additional Child Tax Credit.