You can review the W-2 input to make sure that state taxes withheld were entered correctly.

Select Federal Taxes
Scroll down to Wages and Salaries and select Show More
Select Revisit at Wages and Salaries

Review the list of W-2s entered at Here's your W-2 info. Select Edit next to the W-2 you want to look at. Scroll down and review the information in Boxes 15-17.

If you have more than one W-2 you can repeat the steps for each W-2