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

The deadline for submitting federal income tax forms is April 15. This date is significant because it marks the end of the tax filing season for the previous calendar year, and individuals are required to file their taxes based on their income earned during that year. If April 15 falls on a weekend or a holiday, the deadline may extend to the next business day, but the standard deadline is April 15. This understanding is important for maintaining compliance with tax regulations and avoiding penalties for late submission.

The other dates mentioned do not correspond to the established tax filing deadlines and can lead to confusion for those seeking clarity on tax responsibilities.