TurboTax is asking for your 2023 liability to determine if you made your required minimum payment toward your 2024 liability to avoid an underpayment penalty. You may be liable for an underpayment penalty on your 2024 return because you have a balance of at least $1,000 due on your 2024 Oregon return. This penalty is not related to your 2023 tax return.
You can avoid the underpayment penalty on your 2024 return by paying - for the 2024 tax year - the lesser of 90% of your 2024 tax liability or 100% of your 2023 tax liability. This is why TurboTax is asking for your 2023 liability (safe harbor). It's not assessing a penalty on your 2023 return. This penalty on your 2024 return is strictly related to your 2024 tax liability and payments.
You'll need to enter the amount of tax (after credits) from your Oregon return. Review your 2023 Form OR-40. The amount you want is the amount on line 31 minus the sum of lines 36, 37, 38, and 39.
