page_title: Income tax in the United States
section_title: Tax returns
hierarchical_section_title: Income tax in the United States / Tax collection and examinations / Tax returns
caption_attribution_description: English: Large group of people filling out tax forms in Internal Revenue office
context_page_description: Income taxes in the United States are imposed by the federal, most states, and many local governments. The income taxes are determined by applying a tax rate, which may increase as income increases, to taxable income, which is the total income less allowable deductions. Income is broadly defined. Individuals and corporations are directly taxable, and estates and trusts may be taxable on undistributed income. Partnerships are not taxed, but their partners are taxed on their shares of partnership income. Residents and citizens are taxed on worldwide income, while nonresidents are taxed only on income within the jurisdiction. Several types of credits reduce tax, and some types of credits may exceed tax before credits. An alternative tax applies at the federal and some state levels.
  In the United States, the term "payroll tax" usually refers to FICA taxes that are paid to fund Social Security and Medicare, while "income tax" refers to taxes that are paid into state and federal general funds.
  Most business expenses are deductible.
context_section_description: Individuals (with income above a minimum level), corporations, partnerships, estates, and trusts must file annual reports, called tax returns, with federal and appropriate state tax authorities.  These returns vary greatly in complexity level depending on the type of filer and complexity of their affairs.  On the return, the taxpayer reports income and deductions, calculates the amount of tax owed, reports payments and credits, and calculates the balance due.
  Federal individual, estate, and trust income tax returns are due by April 15 (in 2017, April 18) for most taxpayers.  Corporate and partnership federal returns are due two and one half months following the corporation's year end.  Tax exempt entity returns are due four and one half months following the entity's year end.  All federal returns may be extended, with most extensions available upon merely filing a single page form.  Due dates and extension provisions for state and local income tax returns vary.
  Income tax returns generally consist of the basic form with attached forms and schedules.  Several forms are available for individuals and corporations, depending on complexity and nature of the taxpayer's affairs.  Many individuals are able to use the one page Form 1040-EZ, which requires no attachments except wage statements from employers (Forms W-2).  Individuals claiming itemized deductions must complete Schedule A.  Similar schedules apply for interest (B), dividends (B), business income (C), capital gains (D), farm income (F), and self-employment tax (SE).  All taxpayers must file those forms for credits, depreciation, AMT, and other items that apply to them.
  Electronic filing of tax returns may be done for taxpayers by registered tax preparers.
  
  If a taxpayer discovers an error on a return, or determines that tax for a year should be different, the taxpayer should file an amended return.  These returns constitute claims for refund if taxes are determined to have been overpaid.
  The IRS, state, and local tax authorities may examine a tax return and propose changes.  Changes to tax returns may be made with minimal advance involvement by taxpayers, such as changes to wage or dividend income to correct errors.  Other examination of returns may require extensive taxpayer involvement, such as an audit by the IRS.  These audits often require that taxpayers provide the IRS or other tax authority access to records of income and deductions.  Audits of businesses are usually conducted by IRS personnel at the business location.
  Changes to returns are subject to appeal by the taxpayer, including going to court.  IRS changes are often first issued as proposed adjustments.  The taxpayer may agree to the proposal, or may advise the IRS why it disagrees.  Proposed adjustments are often resolved by the IRS and taxpayer agreeing to what the adjustment should be.  For those adjustments to which agreement is not reached, the IRS issues a 30-day letter advising of the adjustment.  The taxpayer may appeal this preliminary assessment within 30 days within the IRS.
  The Appeals Division reviews the IRS field team determination and taxpayer arguments, and often proposes a solution that the IRS team and the taxpayer find acceptable.  Where agreement is still not reached, the IRS issues an assessment as a notice of deficiency or 90-day letter.  The taxpayer then has three choices:  file suit in United States Tax Court without paying the tax, pay the tax and sue for refund in regular court, or pay the tax and be done.  Recourse to court can be costly and time consuming, but is often successful.
  IRS computers routinely make adjustments to correct mechanical errors in returns.  In addition, the IRS conducts an extensive document matching computer program that compares taxpayer amounts of wages, interest, dividends, and other items to amounts reported by taxpayers.  These programs automatically issue 30-day letters advising of proposed changes.  Only a very small percentage of tax returns are actually examined.  These are selected by a combination of computer analysis of return information
caption: People filing tax forms in 1920.
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