On the Wages & Income page there is a menu line entry for State Refunds.
If you don't see it in the menu below the shaded area up top (showing what you've entered already), there should be a selection at the bottom, to show the whole menu by clicking on the text that says something like: "Show all income items" (or something similar)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*