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

The last day you can send in federal income tax forms is April 15th. This date is significant because it has been established as the traditional deadline for individual income tax returns in the United States. The Internal Revenue Service (IRS) requires that most taxpayers file their Federal income tax forms by this date to avoid penalties and interest on any taxes owed.

In some years, if April 15 falls on a weekend or a federal holiday, the deadline may be extended to the next business day, but generally, taxpayers should plan to have their forms submitted by April 15. Understanding this deadline is important as it helps individuals manage their financial planning and compliance with tax regulations. Other options like March 15, May 15, and June 15 are not recognized as the federal tax filing deadline for individuals, as March 15 typically relates to business returns, while May and June are outside of the standard filing period, leading to potential late filing penalties.