--- title: "Tax Law Changes & Data Updates | TaxWren" description: "Every change to the tax figures behind TaxWren's calculators: new tax years, new laws and corrections, with the official source for each." url: https://taxwren.com/tax-law-changes --- # Tax law changes and data updates Last updated October 10, 2026 Every time a rate, threshold or rule behind our calculators changes, because of a new tax year, a new law or a correction, it is listed here with its source. 1. Oct 10, 2026 · 2026 tax year · Federal 2026 federal figures added from Rev. Proc. 2025-32 (includes One Big Beautiful Bill Act changes) and the SSA 2026 wage base. [Source](https://www.irs.gov/pub/irs-drop/rp-25-32.pdf) 2. Oct 10, 2026 · 2026 tax year · States 2026 state income tax rates, brackets, deductions and exemptions for all 50 states and DC. [Source](https://taxfoundation.org/data/all/state/state-income-tax-rates-2026/) 3. Oct 10, 2026 · 2026 tax year · States Georgia: HB 463 (signed May 11, 2026) cuts the 2026 rate from 5.19% to 4.99% and raises the standard deduction to $15,000 ($30,000 joint) and the dependent exemption to $5,000. California: standard deduction ($5,706/$11,412) and dependent credit ($475) corrected from FTB Form 540. [Source](https://www.legis.ga.gov/api/legislation/document/20252026/249080) 4. Oct 10, 2026 · 2026 tax year · States New 2026 state laws: Arkansas top rate 3.7% (Act 1, May 6); Utah 4.45% (SB 60, Mar 23); West Virginia rates cut ~5% to a 4.58% top (SB 392, Mar 31); South Carolina 1.99%/5.21% with a $15,000/$30,000 SC income adjusted deduction (H.4216, Mar 30); Arizona adopts the federal standard deduction (HB 4168, Jun 13); Hawaii standard deduction steps up to $8,000/$16,000 (Act 46). Ohio: $332 fixed tax on income above $26,050 added (HB 96). [Source](https://dor.sc.gov/news/information-about-h-4216) 5. Oct 10, 2026 · 2026 tax year · States Alabama, Missouri and Oregon now deduct federal income tax as their laws allow (Alabama in full; Missouri 35% down to 0% by AGI; Oregon up to $8,750, phased out at higher AGI). Previously these states' taxes were overstated. [Source](https://www.oregon.gov/dor/forms/FormsPubs/publication-or-estimate_101-026_2026.pdf) 6. Oct 10, 2026 · 2026 tax year · States New York City and Yonkers resident income taxes added. [Source](https://www.tax.ny.gov/pdf/2025/inc/it201i_2025.pdf) 7. Oct 10, 2026 · 2025 tax year · Federal 2025 federal figures from Rev. Proc. 2024-40, with the One Big Beautiful Bill Act changes for 2025 (standard deduction $15,750/$31,500/$23,625, child tax credit $2,200) from Rev. Proc. 2025-32, and the SSA 2025 wage base of $176,100. Q2 estimated payment moved to June 16 because June 15, 2025 was a Sunday. [Source](https://www.irs.gov/pub/irs-drop/rp-24-40.pdf) 8. Oct 10, 2026 · 2025 tax year · States 2025 state income tax rules from the 2025 compiled table. For ID, whose 2025 thresholds were not yet published when that table came out, the actual 2025 thresholds from the 2026 table are used. [Source](https://taxfoundation.org/data/all/state/state-income-tax-rates-2025/) 9. Oct 10, 2026 · 2025 tax year · States Ohio 2025 corrected to the official schedule: $342 plus 2.75% above $26,050 and 3.125% above $100,000 (HB 96). [Source](https://dam.assets.ohio.gov/image/upload/v1767095693/tax.ohio.gov/forms/ohio_individual/individual/2025/it1040-booklet.pdf) 10. Oct 10, 2026 · 2025 tax year · States 2025 history corrected: Maryland 6.25%/6.5% brackets, South Carolina top rate 6%, Utah 4.5% (laws enacted after the 2025 compiled table). [Source](https://taxfoundation.org/data/all/state/state-income-tax-rates-2026/) 11. Oct 10, 2026 · 2025 tax year · States Alabama, Missouri and Oregon now deduct federal income tax as their laws allow (Alabama in full; Missouri 35% down to 0% by AGI; Oregon up to $8,500, phased out at higher AGI). Previously these states' taxes were overstated. [Source](https://www.oregon.gov/dor/forms/FormsPubs/publication-or-estimate_101-026_2026.pdf) 12. Oct 10, 2026 · 2025 tax year · States New York City and Yonkers resident income taxes added. [Source](https://www.tax.ny.gov/pdf/2025/inc/it201i_2025.pdf)