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

The correct answer is April 15th because this date is generally recognized as the deadline for filing federal income tax returns in the United States. The Internal Revenue Service (IRS) sets this date annually, and it typically falls on April 15th, unless that date falls on a weekend or holiday, which may extend the deadline. This deadline applies to individual taxpayers and is crucial for ensuring compliance with federal tax laws.

In contrast, other dates mentioned, such as April 1st, March 31st, and April 30th, do not align with the established tax filing schedule and could lead to confusion regarding tax obligations.