US and Mexico Taxes for Americans Living in Mexico. If you have a fideicomiso, Mexican corporation, a foreign bank account in Mexico, or live in Mexico this blog will have data you need about the required forms 5471, 3520, 3520A, FBAR 114, 926, 8865, 2555, 1116, etc., which you may have to file if you live and work in Mexico.
In addition to this 6-month extension, taxpayers who are out of the country (as defined in the Form 4868 instructions) can request a discretionary 2-month additional extension of time to file their returns (to December 15 for calendar year taxpayers).
To request this extension, you must send the Internal Revenue Service a letter explaining the reasons why you need the additional 2 months. Send the letter by the extended due date (October 15 for calendar year taxpayers) to the following address:
Internal Revenue Service Center
Austin, TX 73301-0215
You will not receive any notification from the Internal Revenue Service unless your request is denied for being untimely.
The discretionary 2-month additional extension is not available to taxpayers who have an approved extension of time to file on Form 2350 (for U.S. citizens and resident aliens abroad who expect to qualify for special tax treatment).