ORS 316.699
Section 4, chapter 579, Oregon Laws 2019, provides:
Sec. 4. Except as provided in ORS 316.699(4), a taxpayer:
(1) May use a subtraction under ORS 316.699 only for contributions made in tax years beginning before January 1, 2020; and
(2) May carry forward and use a subtraction under ORS 316.699 (4) only in tax years beginning before January 1, 2025. [2019 c. 579, § 4]