A year ago I was at the US Embassy for getting additional pages for my Passport as I had run out of them due to heavy traveling. I asked about sending my US tax filings thru diplomatic pouch. It is no longer accepted at all. Hope that helps you. As others have mentioned file etax with turbo tax seems the easiest approach.. However one thing has hit me .. they said I could send estimated taxes thru them for the next four quarters but it is not happening for me yet.. that money builds up so need help to figure out how to submit such fees to the Govt. now too.. any ideas would be appreciated too