Solved
The Oregon kicker was supposed to be the amount on 2022 Form 40 line 22 multiplied by 44.28%. The adjusted Oregon kicker was calculated correctly in the refund adjustment letter I received from the state. Why did TurboTax calculate it wrong?
You have to enter or confirm your 2022 OR tax liability on the Kicker Credit screen. Then TurboTax multiplies that number by 44.28%. It sounds like the correct 2022 tax liability wasn't entered. Was the amount of 2022 tax liability entered incorrectly, or did TurboTax not use 44.28%? What did you enter on the following screen?

Accuracy Guarantee - If TurboTax did not use 44.28% to calculate your credit, use that link to file a claim.
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