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 date is significant because it is set by the Internal Revenue Service (IRS) as the standard deadline for individuals to file their federal income tax returns for the previous calendar year.

If April 15 falls on a weekend or a holiday, the deadline may be extended to the next business day, but generally, taxpayers need to ensure that their returns are postmarked or electronically submitted by this date to avoid penalties and interest. This consistency helps individuals and businesses plan for tax obligations and manage their finances effectively throughout the year.

Other dates mentioned, such as April 1, April 30, and March 15, do not align with the established federal tax filing deadline for individual income tax returns. March 15, for example, is relevant for certain businesses and partnerships that have different filing requirements, but it does not apply to the majority of individual taxpayers.