How do I file an extension? I went to the London embassy site and it says you can get an extension for 2 months. Basically, if what is posted on this thread is correct, I don't want to file my tax return until I have lived here nearly a year, which would be in June. Has anyone filed an extension for their tax return? I believe it says you have to send a letter explaining why you need an extension, and I'm not sure what to say. Thanks for any advice!