The deadline for filing federal income tax returns in the United States is typically April 15th of each year. However, if April 15th falls on a weekend or a holiday, the deadline may be extended to the next business day. For residents of certain states or territories, such as those affected by natural disasters, there may be different deadlines in place. It is also possible to file for an extension, which allows taxpayers additional time to submit their returns, typically until October 15th. It is important to note that an extension to file does not extend the deadline for payment of any owed taxes. To ensure compliance with specific requirements and deadlines, individuals may want to refer to the current web page of the Internal Revenue Service or consult a tax professional for personal circumstances.