For Income Tax Adjustments on CT, says I must add back state taxes deducted on federal return. Where do I find that?

The program says I must add back state taxes that were deducted to arrive at the federal adjusted gross income. I used the Easy Step, so I don't know exactly all of the places where the state tax may have been deducted (I only entered it on our W2s). And, since the program ultimately selected the Standard Deduction, there's no Schedule A for itemization.