In the personal info section, be sure to indicate that you are an active member of the military. See image below.
Thank you for your service.
To edit your Personal Info in TurboTax:
AND THEN......Edit your Military W-2,
.....on a page AFTER the main W-2 form is a page with a whole list of checkboxes.
There is one in the middle you must check to indicate that W-2 was for active duty military service.