Mapping IRS 1040 Tax Data with the Zip Code API: A Complete Guide Understanding how income and demographic data align across geographic regions is key to building smarter insights — and that’s exactly what the Zip Code API delivers. In this guide, we explain how the API connects directly to publicly available IRS 1040 tax return data, providing a clear mapping between individual return fields and zip code–level metrics October 21, 2025 By Ricardo Rangel Tutorials 1040, IRS Statistics, Zip Code API Loading Disqus... Read More »