ITA home This interview will help you determine which form you should use to file your taxes. Note: If you file electronically, the tax preparation software will determine which form you should use. Information you may need All income documents. Your age, your spouse's age, and filing status. Federal income tax withheld. The tool is designed for taxpayers who were U.S. citizens or resident aliens for the entire tax year for which they're inquiring. If married, the spouse must also have been a U.S. citizen or resident alien for the entire tax year. For information about nonresidents or dual-status aliens, please see International taxpayers. Disclaimer Conclusions are based on information provided by you in response to the questions you answered. Answers do not constitute written advice in response to a specific written request of the taxpayer within the meaning of section 6404(f) of the Internal Revenue Code. Estimated completion time: 17 minutes Please note: After 30 minutes of inactivity, you'll be forced to start over. Caution: Using the "Back" button within the ITA tool could cause an application error. Begin