Why do I owe state estimated when I'm getting a refund

[SO1SO2]

I've never had to pay Oregon estimated. On this amended return I'm getting a refund. On the unamended return I owed. 

there is a form OR-10 stating that I owe a large estimated tax amount and TurboTax attached and Annualized Income worksheet that makes no sense. 

How do I resolve this?

[MaryK4]

For Oregon. underpayment interest is charged if your tax after all credits and withholding is $1,000 or more and you don’t qualify for an exception. 
 

Note: You could be charged interest on underpayment of estimated tax even if you are getting a refund. 

TurboTax uses the Annualized Income Worksheet to determine if the exception applies.