What is Form 1040 and when is it due?

Form 1040 is the U.S. Individual Income Tax Return form used by individual taxpayers to report their annual income, deductions, and credits to the Internal Revenue Service (IRS). It must be filed by April 15th each year for the previous tax year, unless an extension is requested. For example, the Form 1040 for tax year 2025 is due by April 15, 2026. The standard deduction for tax year 2025 is $15,300 for married filing jointly or qualifying widow(er), $12,750 for heads of household, and $7,650 for single or married filing separately (Source: IRS Revenue Procedure 2024-40).