Your filing status is used to determine your filing requirements, standard deduction, eligibility for certain credits, and your correct tax. If more than one filing status applies to you, this interview will choose the one that will result in the lowest amount of tax.
Information you’ll need;
- Marital status and spouse’s year of death (if applicable).
- The percentage of the costs that your household members paid toward keeping up a home.
The tool is designed for taxpayers that 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. Source