Material rate, formula, source, and interface changes are recorded here so readers can judge freshness instead of guessing.
Refund results and state-specific vehicle planning
Added federal withholding and estimated payments to the income-tax calculator, with a projected refund or amount-owed result.
Published California, Texas, Florida, New York, and Pennsylvania out-the-door pages with preselected rules and official verification links.
Added Florida's capped local-surtax planning model and stopped treating a private sale as a dealer trade-in.
Added complete free-software structured data and meaningful route-level sitemap dates.
No tax knowledge required to start
Replaced tax-jargon inputs with facts visitors normally know: money received, purchase cost, sale proceeds, wages and expenses.
Added 2026 state-and-local average sales-tax presets for every US state and the District of Columbia, with transparent planning-rate labels and optional exact-rate overrides.
Made capital-gain basis, self-employment profit, quarterly total tax, safe-harbor selection, standard deductions and common rate choices automatic.
Added a consistent “No tax expertise needed” explanation to every calculator while keeping limitations beside the result.
Calculator-first tool pages
Moved every calculator directly below a compact tool introduction so inputs appear in the first viewport on desktop and mobile.
Moved methodology and trust guidance below the result while preserving source, privacy, and limitation details.
Made tool-page navigation stay on the current calculator and clarified that results update instantly.
Added calculator-visible and input-started funnel events alongside completed calculations.
Embeds, citation assets, and auditable interactions
Added four free iframe calculators: federal income, 1099, self-employment, and sales tax.
Added downloadable bracket, SE-tax flow, quarterly-payment, and official state-agency tables.
Added local-only input saving, result copy/print actions, event-level analytics, and formula flow diagrams.