You're most welcome @Kinofukiage. The IRS will probably eventually non-filer letter if you never file the past returns. It was ask whether you need to file.
They often create a "tax return" based on information they have, but since you live overseas, I suspect nothing is being reported to the IRS so they have no data on you, so you will probably just get a letter. Your income may be exempt from taxation anyway under the Foreign Earned Income Exclusion,
