Form 1040 is the standard U.S. individual income tax return form used by taxpayers to report their annual income and calculate their federal tax liability.
It is issued by the Internal Revenue Service (IRS) and is accompanied by various schedules and attachments that provide additional details about income, deductions, credits, and other relevant tax information.
Taxpayers use the Form 1040 to determine their tax liability and either request a refund or make a payment to cover any taxes owed. There are different versions of Form 1040, including the 1040-EZ and 1040-A, for simplified tax situations.