When is the last day to send in federal income tax forms?

The last day to send in federal income tax forms is April 15. This deadline is significant because it marks the end of the tax season for individual taxpayers in the United States. Typically, April 15 is the last day for taxpayers to file their annual income tax returns for the previous calendar year.

The date is well-established, and the Internal Revenue Service (IRS) uses it as a guideline for tax compliance. If April 15 falls on a weekend or holiday, the deadline may be adjusted to the next business day, ensuring that taxpayers have a clear timeframe to meet their obligations. Understanding this deadline is crucial for citizens to avoid penalties and ensure they comply with federal tax laws. The other dates mentioned do not relate to the federal income tax filing deadline, as they might correspond to deadlines for different types of tax filings or other obligations, but they are not applicable for individual income tax returns.