A tax return is a document filed with tax authorities that reports income, expenses, and other relevant financial information. When filing a tax return, taxpayers calculate their tax due, plan their tax payments, and claim a refund of overpaid taxes. In most cases, tax returns must be filed annually.
The US tax system is organized at both the federal and state levels. There are different types of taxes such as income, sales, and capital gains. Federal and state taxes are completely separate, each with its own taxing powers. The federal government has no right to intervene in state taxation.