Sources and updates log

Every primary source the site relies on, and every change we make to tax figures, with dates.

Last updated

Updates log

DateChangePages affected
Site launch. All figures checked against the sources listed below.All tools
Employer database seeded with 14 companies from published reports.Employer database

Primary sources

SourceUsed on
Instructions for Form 4547, Trump Account Election(s)Trump Account pages
IRS Notice 2025-68Trump Account pages
Internal Revenue Bulletin 2026-37Employer contributions, investment rules
IRS Notice 2025-69Tips, overtime
Internal Revenue Bulletin 2026-18Tips
IRS list of tipped occupationsTipped occupations
IRS FAQs on qualified overtime (FS-2026-13)Overtime, W-2 decoder
2026 General Instructions for Forms W-2 and W-3W-2 decoder
Internal Revenue Bulletin 2026-39Car loan interest
IRS Publication 554Senior deduction
NHTSA vPIC VIN decoderVIN check