Data Changelog

Material changes to the IRS-derived datasets, calculation engine, or public methodology. Cosmetic layout edits are omitted. To report a figure that looks wrong on a specific page, use contact with the URL (or /contact?about=/your-page from any data page footer). See our corrections policy and editorial corrections process.

  1. Guides topic taxonomy + tools schema stack

    Added IRS-publication topic clusters on /guides (four h2 sections, ten h3 entries), ItemList JSON-LD on the guides hub, and WebApplication + ItemList @graph schema on /tools and individual interactive tool pages.

  2. Statistics corpus tables

    Shipped three source-derived tables on /statistics: standard deduction by tax year (7×4 filing statuses), 37% bracket entry thresholds, and retirement contribution limits, all cells imported from src/data/, not hand-typed.

  3. POSTURE-B guide attestation

    Converted interpretive advice prose in AMT, self-employment, HSA/FSA, SALT, and marginal-rate guides to IRS-attributed registry voice per YMYL posture requirements.

  4. 2026 tax-year corpus refresh

    Published IRS Revenue Procedure 2025-32 inflation adjustments for tax year 2026: brackets, standard deductions, AMT exemptions, and retirement contribution limits across all filing statuses.

  5. Portal launch

    Initial public release with federal tax brackets 2020–2026, standard deductions, interactive calculator, and filing guides sourced from IRS publications.