I agree with the view that this starts in 2026:
SEC. 70424. PERMANENT AND EXPANDED REINSTATEMENT OF PARTIAL DEDUCTION FOR CHARITABLE CONTRIBUTIONS OF INDIVIDUALS WHO DO NOT ELECT TO ITEMIZE. (a) In General.--Section 170(p) is amended-- (1) by striking ``$300 ($600″ and inserting ``$1,000 ($2,000″, and (2) by striking ``beginning in 2021″. (b) Effective Date.--The amendments made by this section shall apply to taxable years beginning after December 31, 2025.
SEC. 70424. PERMANENT AND EXPANDED REINSTATEMENT OF PARTIAL DEDUCTION FOR CHARITABLE CONTRIBUTIONS OF INDIVIDUALS WHO DO NOT ELECT TO ITEMIZE.
(a) In General.--Section 170(p) is amended-- (1) by striking ``$300 ($600″ and inserting ``$1,000 ($2,000″, and (2) by striking ``beginning in 2021″.
(b) Effective Date.--The amendments made by this section shall apply to taxable years beginning after December 31, 2025.
(emphasis mine).
https://www.congress.gov/bill/119th-congress/house-bill/1/text/enr
I agree with the view that this starts in 2026:
(emphasis mine).
https://www.congress.gov/bill/119th-congress/house-bill/1/text/enr