- Alabama Dept. of Revenue — The One, Big, Beautiful Bill Act, Analysis and Tax Provisions
- Alabama DOR — 2026 Form 40ES
- Alaska DOL — employee unemployment contribution · Monitored
- Alaska DOR — personal income tax · Monitored
- Aprio — Georgia tax refunds, conformity update: two bills, big impact · Monitored
- Arizona HB 4168 (2026, enacted) — standard deduction and rate confirmation
- Arkansas DFA — 2026 withholding formula, bracket adjustment table
- California EDD — 2026 rates and withholding · Monitored
- California EDD DE 44 (2026), p.25 — supplemental wage withholding · Monitored
- Central Collection Agency — Cleveland municipal income tax · Monitored
- City of Birmingham — Tax and License Division
- City of Cincinnati — income tax division
- City of Columbus — income tax division · Monitored
- City of Kansas City, MO — earnings tax (E-Tax)
- City of Philadelphia — wage tax rates · Monitored
- City of St. Louis, MO — individual earnings tax
- City of Wilmington — earned income and net profits tax
- Colorado DOR — 2026 DR 1098 · Monitored
- Colorado FAMLI — employers · Monitored
- Colorado General Assembly — HB25-1296 · Monitored
- Comptroller of Maryland — Tax Alert: Maryland Impacts of the One Big Beautiful Bill Act · Monitored
- Connecticut DRS — 2026 Form CT-1040ES, Tax Calculation Schedule and Tables C, D and E
- Connecticut DRS — IP 2026(7), 2026 withholding and income-tax informational publication
- Connecticut Paid Leave — contribution rate
- DC Office of Tax and Revenue — 2026 D-40ES booklet · Monitored
- Delaware Division of Revenue — Tax Season Updates · Monitored
- Delaware DOR — personal income-tax forms
- Delaware Paid Leave — contributions
- Florida Constitution — Article VII · Monitored
- Forvis Mazars — Arizona updates IRC conformity date to January 1, 2026 · Monitored
- Georgia DOR — 2026 Employer's Tax Guide (REVISED June 2026, post-HB 463) · Monitored
- Grant Thornton — CA conformity date update excludes OBBBA · Monitored
- Hawaii Act 46, Session Laws of Hawaii 2024 (H.B. 2404) — 2026 rate schedule and standard deduction
- HRS §235-2.3 — conformance to the federal Internal Revenue Code · Monitored
- Idaho State Tax Commission — 2026 percentage table · Monitored
- Idaho State Tax Commission — update on filing 2025 Idaho income taxes · Monitored
- Illinois CPA Society Insight — Decoding the One Big Beautiful Bill's impact on state income taxes · Monitored
- Illinois DOR — 2026 withholding guide · Monitored
- Indiana Department of Revenue — 2026 Legislative Synopsis (SB 243) · Monitored
- Indiana DOR — Departmental Notice 1 · Monitored
- Iowa Department of Revenue — Impact of One, Big, Beautiful Bill Act on Employee Withholding · Monitored
- Iowa DOR — 2026 withholding formula · Monitored
- K.S.A. 79-32,117 — Kansas adjusted gross income of an individual · Monitored
- Kansas DOR — 2026 K-40ES
- Kentucky DOR — 2026 withholding formula · Monitored
- Kentucky Revised Statutes §141.019(2)(k)-(l), as amended by 2026 Ky. Acts ch. 161 (HB 757) and ch. 198 (HB 869) · Monitored
- Louisiana DOR — 2026 estimated-tax instructions
- Louisiana R.S. 47:293(1) — definition of adjusted gross income · Monitored
- Maine Paid Family and Medical Leave — contributions
- Maine Revenue Services — 2026 Individual Income Tax Rates (rev. 2026-05-20) · Monitored
- Maine Revenue Services — 2026 legislative changes (P.L. 2025 c.650 Pt. DDDD)
- Maine Revenue Services — Maine Tax Alert, Vol. 35 Issue 14 · Monitored
- Maryland Comptroller — 2026 Payment Voucher Worksheet (PVW) rate schedules · Monitored
- Massachusetts DOR — 2026 Form 1-ES instructions (surtax threshold) and tax rates
- Massachusetts DOR — TIR 26-4, Massachusetts Conformity to Certain Provisions in Public Law No. 119-21 · Monitored
- Massachusetts PFML — contribution rates · Monitored
- Michigan Treasury — 2026 withholding guide · Monitored
- Michigan Treasury — new deductions for qualified overtime compensation and qualified tips · Monitored
- Minnesota Department of Revenue — Analysis of Session Laws 2026, Chapter 128 (H.F. 2438)
- Minnesota DOR — 2026 brackets and deductions · Monitored
- Minnesota Paid Leave — premiums
- Mississippi DOR — 2026 withholding publication · Monitored
- Missouri Department of Revenue — 2025 Individual Income Tax Year Changes · Monitored
- Missouri DOR — 2026 Form MO-1040ES (Rev. 12-2025), 2026 Tax Rate Chart
- Montana Code Annotated §15-30-2120 · Monitored
- Montana DOR — 2026 Publication 1, A Guide to Montana Tax Withholding
- N.Y. Tax Law §612, corroborated by WHEC.com fact-check on state OBBBA conformity · Monitored
- NCDOR — Questions and Answers about the Impact of Federal Law on NC Individual and Corporate Income Tax Returns · Monitored
- Nebraska Department of Revenue — Effects of the One Big Beautiful Bill Act on the State of Nebraska · Monitored
- Nebraska DOR — 2026 Form 1040N-ES (Rev. 11-2025) · Monitored
- Nevada Department of Taxation — income tax in Nevada · Monitored
- New Hampshire DRA — interest and dividends tax FAQ · Monitored
- New Jersey DOL — worker contribution rates · Monitored
- New Jersey Treasury — income-tax rates
- New Mexico Taxation and Revenue Department — personal income tax overview · Monitored
- New Mexico TRD — personal income tax rates
- New Mexico WCA — Employer Compliance Bureau
- New York Paid Family Leave — cost and deductions
- NJ Division of Taxation — One Big Beautiful Bill Act and the New Jersey Gross Income Tax · Monitored
- North Carolina DOR — 2026 NC-30 withholding tables and instructions
- North Dakota Century Code ch. 57-38 — North Dakota taxable income · Monitored
- North Dakota Tax — 2026 Form ND-1ES (SFN 28709, 12-2025) annual rate schedules
- NY State IT-2105-I (2026) — tax computation worksheets 1-16 · Monitored
- NYS-50-T-NYS (1/26), p.3 — NY State supplemental wage rate · Monitored
- Ohio CPA Society — take action on Senate Bill 9, Ohio's annual tax conformity legislation · Monitored
- Ohio Revised Code §5747.02 and §5747.025 — 2026 rate and exemption amounts
- Oklahoma Society of CPAs — overtime and tip income deductions · Monitored
- Oklahoma Tax Commission — 2026 OW-2 · Monitored
- Oregon Capital Chronicle — Oregon will partially disconnect state tax code from new federal code · Monitored
- Oregon DOR — 2026 withholding formulas · Monitored
- Oregon DOR — statewide transit tax · Monitored
- PA DCED — Official EIT Tax Register, reporting year 2026 (Pittsburgh City / Pittsburgh SD, PSD 700102)
- Paid Leave Oregon — employers · Monitored
- Pennsylvania DOR — Personal Income Tax Guide, Gross Compensation · Monitored
- Pennsylvania DOR — REV-413(I), 2026 Instructions for Estimating PA Personal Income Tax
- Rhode Island Division of Taxation — 2026 RI-1040ES instructions
- Rhode Island DLT — TDI and TCI contribution rates
- RI Division of Taxation — ADV-2025-20, H.R. 1 RI Decoupling Guidance · Monitored
- South Carolina DOR — Information Letter #26-4 (Revised) · Monitored
- South Carolina H.4216 (Act 110, R117, signed 2026-03-30) — enacted text · Monitored
- South Dakota DOR — individual taxes · Monitored
- Tax Foundation — 2026 state rates, brackets, deductions, and exemptions · Monitored
- Tax Foundation — State Tax Implications of the OBBBA
- Tennessee DOR — Hall income-tax rates · Monitored
- Texas Constitution — Article VIII, Section 24
- Thomson Reuters — Which states are decoupling from federal tax provisions? · Monitored
- Utah State Tax Commission — Publication 14, Withholding Tax Guide · Monitored
- Utah State Tax Commission — TC-40A supplemental schedule instructions · Monitored
- Vermont Department of Taxes — 2026 rate schedules
- Vermont Department of Taxes — Child Care Contribution · Monitored
- Vermont Department of Taxes — Tax Law and Guidance, OBBBA
- Virginia Code §58.1-320 and 2026 tax-law changes · Monitored
- Virginia Dept. of Taxation — Tax Bulletin 26-1, Date of IRC Conformity Advanced · Monitored
- W. Va. Code §11-21-12 — West Virginia adjusted gross income of resident individual · Monitored
- WA Cares Fund — premium calculation · Monitored
- Washington DOR — income tax · Monitored
- Washington Paid Leave — premium rates · Monitored
- West Virginia Code §11-21-4j (SB 392, 2026 Reg. Sess., Ch. 277) — 2026 rate schedule
- Wisconsin Dept. of Revenue — 2025 Form 1 Instructions (I-111) · Monitored
- Wisconsin DOR — 2026 Form 1-ES Instructions (estimated income tax)
- Wright Lindsey Jennings / Kutak Rock — 2025 Arkansas Tax & Incentives Legislation Summary
- Wyoming Business Council — business tax environment
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