In the W2 section under State Taxes, Box 15 - State asks me to choose my state. Tennessee does not appear in the choice list. How do I enter Tennessee?

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