If there is not state reporting requirement, boxes 15, 16 and 17 will be blank.
If Box 15 and 16 are filled, then you should reconfirm with your employer on Box 17 - they should have withheld some state income tax which should be reflected under Box 17. If nothing has been withheld, then it should have stated 0.00 and this is what you would enter on your taxes (and you would have to pay state taxes at the time of filing).
