If you are a US resident living or working abroad, including military duty, the deadline to file is
June 15, 2017. Below describes more from
Tax Year 2016 Calendar: Important dates and Deadlines.
However, if you wish to file an extension Form 4868 in TurboTax program, you
will not be able to e-file without a US address. However, you can use any of the following options to do so.
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Make a payment to the IRS and select Form 4868 as the payment type.
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Download and print Form 4868,
fill it out, and get it postmarked before midnight April 18. Payment
and mailing instructions are on pages 3 and 4 of your printout.
You cannot e-file, but print out the Form 4686
and hand-write your foreign address in the appropriate space.
I hope the information helps !!
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