The term "tax form" is commonly used to refer to the formal documents that taxpayers must file every year to report their income and taxes paid or owed. However, there are several synonyms for the phrase, including tax return, tax document, tax declaration, tax filing, and tax statement. These terms are often used interchangeably, and their meaning is essentially the same. Taxpayers are required to submit the correct tax form to the Internal Revenue Service (IRS) or appropriate tax authority in their country of residence. To avoid any confusion, it is essential to use the correct terminology when discussing tax matters.