Tax documents are official papers that individuals and businesses use to report their income, expenses, and other financial information to the government. These documents help determine how much tax is owed or if a refund is due. Common types of tax documents include W-2 forms, 1099 forms, and tax returns. Filing tax documents is an essential part of complying with tax laws. They must be submitted to the appropriate government agency, such as the Internal Revenue Service (IRS) in the United States, by specific deadlines each year. Properly organized tax documents can also help in case of an audit.