Each year the Metropolitan Policy Program at Brookings receives ZIP code-level administrative data from the IRS that offer a detailed look at all tax filers as well as taxpayers who claimed the Earned Income Tax Credit (EITC). After processing and aggregating the data to various levels of geography—from cities and towns, to counties, to metro areas, to state legislative and congressional districts—Brookings makes them available online for service providers, advocates, researchers, and other stakeholders through our EITC Interactive application. Released in mid-September, the latest version includes data from 2011, the most recent year for which detailed data are available. Click here to learn more.