How can I proceed with my return? I cannot enter my state of TN in box 15 on my return. TN does not have an ID number nor a state income tax. How do I finish my return?

Several  states do not have a state income tax.  So these states will not show up in certain drop down lists.   Leave boxes 15, 16, and 17 blank when you enter a W-2 for these states.

Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington and Wyoming