What Tonights Bible verse is talking about is How Jesús eventhough he was sinless he became sin for us (Aka He was treated/was punished as a sinner or as sin itself by getting cucrified) taking the punishment for us and Even making us The Righteousness of God (Aka Jesús by getting cucrified and punished as a sinner took our sin from upon us eventhough he was without sin also Made us Become Righteous not because the righteousness is ours just as the sin was not His but because the Righteousness is from God himself in us)
I reccomend to Please read the [Enduring Word Bible Commentary ]in order to understand and learn more about the Bible and verses ,especially tonights verse wich's Explanation is a shortened versión of what is on the Commentary (⁰▿⁰)!