TurboTax assumes state refund is taxable. I cannot get it to ask again for 2017 return info after saying I did not have my 2017 return.

When entering my 1099-G info for my state tax refund, I clicked the box saying that I do not have my 2017 tax return, so just assume that my entire state tax refund is taxable. Now, I found my 2017 return and want to enter the information, but Turbotax will no longer ask that question when I go through the state tax menu. I even tried deleting the information from my 1099-G and starting fresh, but it still won't ask me. How can I get TurboTax to ask me the questions to see if my state tax refund is taxable?