If you are using TurboTax desktop and have gone to "Forms Mode" you should be able to change the state (Line 1(b)(1) of the "Tax and Interest Deduction Worksheet" "by double clicking on the box and type the correct state abbreviation in the box. I was able to change this line in my TurboTax Desktop program.
You can try contacting TurboTax Customer Service where you may be able to share your screen so they can guide you: Turbo Tax Customer Service
Please come back to TurboTax Community with any additional information or questions you may have and we will be glad to help you.