How do I proceed with my taxes when it's asking me for a value for a box 17 in my 1099-INT, but there is no value there?

TurboTax is telling me that if box 16 (State Identification No.) has a value, then box 17 (State tax withheld) should have a value, but it doesn't. It won't let me proceed with filing. I called my bank and they told me they couldn't help.