What do I input if I don't see my state listed for Block 15 despite seeing it on my W-2?

[creamish]

I have a state listed on Block 15 on my W-2 but it doesn't show as an option here.

[VolvoGirl]

What state?  Some states do not have an income tax.  If box 17 is blank or 0 then leave boxes 15-17 blank.  

[DoninGA]

Only the states which do not have a personal income will not be on the dropdown for box 15 -

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

If one of these states is shown in box 15 then leave boxes 15, 16 and 17 blank on the W-2.