Yes , you have the automatic two months extension, being abroad .
As a citizen, you file form 1040 ( supported by Turbotax ) not as a non-resident alien ( form 1040-NR ).
TurboTax does allow foreign address - I would suggest using a downloaded version ( my personal favorite because it leaves everything on my machine, always available to me AND because it allows me to look at the forms as they filled out -- bad side is it costs much more than on-line version ) --- you have to choose "foreign address tick box"
Disclosure -- we all are volunteers , not associated with TurboTax and do not derive any benefits financial or otherwise from TurboTax and/or Intuit
