Here is a link with more information about the two month extension.
https://www.irs.gov/individuals/international-taxpayers/u-s-citizens-and-resident-aliens-abroad-auto...
How To Get 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.
- You are living outside of the United States and Puerto Rico and your
main place of business or post of duty is outside the United States and
Puerto Rico, or
- You are in military or naval service on duty outside the United States and Puerto Rico
