Changelog

A hand-kept changelog drifts from the data within one release and then quietly misleads — the reason this site has never had one. What follows instead is derived: every date recorded here is a real verifiedOn or readOn field already attached to a source in the tax data, walked and grouped rather than typed out separately. It cannot say a document was read on a date the data does not carry.

Read, not changed

This page answers when a source was last read, not whether the figure it supports actually moved. Most bodies of law here were read in one research pass covering dozens of jurisdictions at once, so a date below with forty entries under it usually means one sitting at a keyboard, not forty separate events on that day.

The list of figures that were actually wrong and then fixed — what a figure said, what it says now, and how the mistake was found — is a different, shorter page: the corrections log. Read this page for coverage and freshness; read that one for mistakes.

Every read, by date

424 sources across every body of law this site cites. A date with more than 8 is a bulk research pass and is summarised by body of law rather than listed URL by URL — the full list for any of them is on the source index, grouped the other way.

1. 2026-10-15

   • ATO: PAYG withholding Schedule 1, coefficients for weekly payments — Australian tax, HELP, super 2026-27
   • Oregon Employment Department — Current Tax and Contribution Rates — State unemployment tax (SUTA)
   • SSA contribution and benefit base — Federal rules

2. 2026-10-08

   • Alabama Dept. of Workforce -- Unemployment Compensation Employer Information — State unemployment tax (SUTA)
   • Marcus by Goldman Sachs — High Yield Online Savings Account — High-yield savings rates

3. 2026-10-06

   • Ally Bank — Online Savings Account — High-yield savings rates
   • City of Ashland — occupational license fee (effective 2026-01-01) — Kentucky local levies

4. 2026-10-04

   • Agirc-Arrco : cotisations au régime en 2026 — French payroll and withholding 2026
   • BOFIP : grilles des taux par défaut du prélèvement à la source — French payroll and withholding 2026
   • Service-public.fr : Smic — French payroll and withholding 2026
   • Urssaf : plafonds de la Sécurité sociale — French payroll and withholding 2026
   • Urssaf : prévoyance complémentaire — French payroll and withholding 2026
   • Urssaf : taux de cotisations du secteur privé — French payroll and withholding 2026

5. 2026-10-03

   • Australian tax, HELP, super 2026-27 — 10 sources
   • German wage tax and social 2026 — 6 sources
   • Canadian tax, CPP and EI 2026 — 5 sources

6. 2026-10-02

   • UK tax, NI and student loans 2026/27 — 14 sources

7. 2026-09-07

   • Oklahoma Employment Security Commission -- Important Numbers for Employers in 2026 — State unemployment tax (SUTA)

8. 2026-09-06

   • State unemployment tax (SUTA) — 26 sources
   • Federal rules — 1 source
   • State income tax — 1 source
   • ZIP jurisdiction lookup — 1 source
   • State withholding formulas — 1 source

9. 2026-09-05

   • State withholding formulas — 33 sources
   • State income tax — 8 sources
   • Convenience-of-employer rules — 1 source

10. 2026-09-04

    • State withholding formulas — 8 sources
    • State income tax — 7 sources

11. 2026-09-03

    • Colorado Dept. of Labor and Employment — wage and hour laws, including paid sick leave — Garnishment statutes
    • LFUCG — Division of Revenue, occupational license fees — Kentucky local levies

12. 2026-09-01

    • Gusto — published payroll pricing — S-corp overhead

13. 2026-08-31

    • S-corp entity costs — 11 sources
    • Convenience-of-employer rules — 5 sources

14. 2026-08-30

    • BLS Occupational Employment and Wage Statistics — May 2025 national cross-industry estimates (oesm25nat) — BLS occupation wages (2025)

15. 2026-08-25

    • BLS Occupational Employment and Wage Statistics — May 2023 national cross-industry estimates — BLS occupation wages (2023)
    • Treasury Decision 10044, 91 FR 19026 — Table A, Reported Tips of Single-Job Holders, Tax Year 2023 — Tipped occupation economics

16. 2026-08-23

    • Kentucky Revised Statutes §141.019(2)(k)-(l), as amended by 2026 Ky. Acts ch. 161 (HB 757) and ch. 198 (HB 869) — State income tax
    • Louisiana R.S. 47:293(1) — definition of adjusted gross income — State income tax

17. 2026-08-22

    • Ohio municipal income tax — 68 sources
    • Garnishment statutes — 64 sources
    • Reciprocity agreements — 16 sources
    • Kentucky local levies — 12 sources
    • State income tax — 9 sources
    • Other local jurisdictions — 1 source

18. 2026-08-21

    • 26 USC §224 (qualified tips), as codified — Federal rules
    • 26 USC §225 (qualified overtime compensation), as codified — Federal rules
    • California EDD DE 44 (2026), p.25 — supplemental wage withholding — State income tax
    • DC Code 1-206.02(a)(5) (Home Rule Act 602(a)(5)) — Reciprocity agreements
    • Iowa Dept. of Revenue, Form 44-016 — Employee's Statement of Nonresidence in Iowa — Reciprocity agreements
    • IRS Notice 2025-69 — guidance for tips and overtime, tax year 2025 — Federal rules
    • NJ Division of Taxation — the NJ/PA Reciprocal Agreement — Reciprocity agreements
    • Treasury Decision 10044 — final occupations-that-receive-tips regulation — Federal rules

19. 2026-08-17

    • IRS Notice 2025-67 — 2026 amounts relating to retirement plans — Federal rules

20. 2026-08-16

    • IRS Rev. Proc. 2025-32 — 2026 tax rate tables (Tables 1 to 4) — Federal rules

21. 2026-08-13

    • Other local jurisdictions — 10 sources
    • State income tax — 10 sources
    • Federal rules — 1 source

22. 2026-08-12

    • IRS Publication 15 (2026), Circular E — supplemental wages — Federal rules

23. 2026-08-09

    • State income tax — 57 sources
    • Federal rules — 3 sources

24. 2026-07

    • Forvis Mazars — Arizona updates IRC conformity date to January 1, 2026 — State income tax

25. 2026-05-26

    • Minnesota Department of Revenue — Analysis of Session Laws 2026, Chapter 128 (H.F. 2438) — State income tax

26. 2026-03-20

    • Aprio — Georgia tax refunds, conformity update: two bills, big impact — State income tax

27. 2026-03

    • Indiana Department of Revenue — 2026 Legislative Synopsis (SB 243) — State income tax

28. 2026-02-25

    • Oregon Capital Chronicle — Oregon will partially disconnect state tax code from new federal code — State income tax

29. 2026-02-20

    • Virginia Dept. of Taxation — Tax Bulletin 26-1, Date of IRC Conformity Advanced — State income tax

30. 2026-02-17

    • Idaho State Tax Commission — update on filing 2025 Idaho income taxes — State income tax

31. 2026-02-06

    • Ohio CPA Society — take action on Senate Bill 9, Ohio's annual tax conformity legislation — State income tax

32. 2026-01-30

    • South Carolina DOR — Information Letter #26-4 (Revised) — State income tax

33. 2026-01-08

    • NCDOR — Questions and Answers about the Impact of Federal Law on NC Individual and Corporate Income Tax Returns — State income tax

34. 2026-01-06

    • Comptroller of Maryland — Tax Alert: Maryland Impacts of the One Big Beautiful Bill Act — State income tax
    • Michigan Treasury — new deductions for qualified overtime compensation and qualified tips — State income tax

35. 2026-01

    • Oklahoma Society of CPAs — overtime and tip income deductions — State income tax

36. 2025-Fall

    • Illinois CPA Society Insight — Decoding the One Big Beautiful Bill's impact on state income taxes — State income tax

37. 2025-12-01

    • NJ Division of Taxation — One Big Beautiful Bill Act and the New Jersey Gross Income Tax — State income tax

38. 2025-11-06

    • Thomson Reuters — Which states are decoupling from federal tax provisions? — State income tax

39. 2025-10-31

    • Alabama Dept. of Revenue — The One, Big, Beautiful Bill Act, Analysis and Tax Provisions — State income tax

40. 2025-10-21

    • Grant Thornton — CA conformity date update excludes OBBBA — State income tax
    • Massachusetts DOR — TIR 26-4, Massachusetts Conformity to Certain Provisions in Public Law No. 119-21 — State income tax

41. 2025-10-02

    • RI Division of Taxation — ADV-2025-20, H.R. 1 RI Decoupling Guidance — State income tax

42. 2025-10

    • Maine Revenue Services — Maine Tax Alert, Vol. 35 Issue 14 — State income tax

43. 2025-09-17

    • Tax Foundation — State Tax Implications of the OBBBA — State income tax

44. 2025-09-02

    • Nebraska Department of Revenue — Effects of the One Big Beautiful Bill Act on the State of Nebraska — State income tax

45. 2025-07-31

    • New Mexico Taxation and Revenue Department — personal income tax overview — State income tax

46. 2025-07

    • Wright Lindsey Jennings / Kutak Rock — 2025 Arkansas Tax & Incentives Legislation Summary — State income tax

47. 2025-06

    • HRS §235-2.3 — conformance to the federal Internal Revenue Code — State income tax

48. 2025-05-16

    • Colorado General Assembly — HB25-1296 — State income tax