Go back and review your 1099-R entries. One of them may have information in Box 16, which would require an entry on Box 15. To review your forms, search for 1099-R and use the Jump to link. Then click Edit next to each form to review your entries.
Also, there are follow-up questions you have to answer after you enter all of your 1099-Rs (about disaster distributions). Leaving those unanswered could create unnecessary forms in your return. To get to the disaster questions, scroll down and click on Continue after all 1099-Rs are entered and/or reviewed. The next screen will be about disaster distributions.
If you are having an issue entering the state information from your 1099-R, please use the sign up link in this TurboTax FAQ to receive notifications on the progress of this experience.