Did you import your state return from your federal return? If you did, there may have been an error during the import process. Try manually entering your state return.
Please click the TurboTax Help links, listed below, to learn more.
https://ttlc.intuit.com/community/entering-importing/help/why-can-t-i-import-my-w-2/00/26447
https://ttlc.intuit.com/questions/2975673-how-do-i-manually-enter-my-w-2