Unless you have state withholding on Box 14, none of the state boxes need to be completed. You can go back and use the delete key to clear the field for Box 16.
If this does not work In your situation, you should first clear the cache and cookies It handles many issues that seem nonsensical on a regular basis.
- Close your TurboTax return first.
Watch to be sure you are selecting 'all time' as example. Do not use selections like 'last hour' for those browsers that give you options.