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

The correct answer is April 15, as this date is traditionally recognized as the deadline for filing federal income tax returns in the United States. This deadline gives individuals a standard amount of time to organize their financial information and complete their tax returns for the previous calendar year.

It's also worth noting that if April 15 falls on a weekend or a holiday, the deadline may be extended to the next business day. This deadline is significant as it is enforced by the Internal Revenue Service (IRS), making it crucial for taxpayers to comply to avoid penalties and interest on any taxes owed.

Other choices, such as January 1 or April 1, are not recognized federal deadlines for tax filing, while June 30 is also outside of the designated tax filing period for the previous year, making April 15 the accurate and relevant date for this question.