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 15. This date is significant because it has historically been set as the deadline for individuals to submit their income tax returns to the Internal Revenue Service (IRS) for the previous year’s income. Taxpayers must ensure that their forms are postmarked by this date to avoid penalties or interest charges on any unpaid taxes.

In years when April 15 falls on a holiday or weekend, the deadline may be extended to the next business day, but the general rule remains that April 15 is the accepted standard deadline. Understanding this date is crucial for tax planning and compliance, as failing to file by the deadline can result in significant financial repercussions.