Get your taxes done using TurboTax

According to the IRS website https://www.irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad-autom...

If you file a joint return, either you or your spouse can qualify for the automatic extension. If you and your spouse file separate returns, this automatic extension applies only to the spouse who qualifies.

Please note that the extension is until June 15th and if you have a balance due interest will still accrue on any balance due from April15th to June 15th.  However no penalties will accrue.

You must check a box in TurboTax when you do file your taxes.  Type in automatic extension for persons outside the U.S. in the search bar at the top of the page when your return is open and check the box that you want to apply for the extension. 

To use this automatic 2-month extension, you must attach a statement to your return explaining which of the two situations listed earlier qualified you for the extension.