A tax return is a form that individuals and businesses file with the government to report their income, expenses, and other financial information for a specific year. This document helps determine how much tax is owed or if a refund is due. Filing a tax return is typically required annually, and it can be done using various methods, including online software or through a tax professional. The information provided on the return is used by the Internal Revenue Service (IRS) in the United States to assess tax liability and ensure compliance with tax laws.