(2) As used in ORS 311.666, "Internal Revenue Code" means the federal Internal Revenue Code as amended and in effect on April 1, 2021, including amendments that take effect after that date. [2014 c.52 §15; 2015 c.348 §27; 2015 c.442 §22; 2016 c.33 §15; 2017 c.527 §16; 2018 c.101 §16; 2019 c.319 §16; 2021 c.456 §17]