I'm overseas and the forms are mail in only. I mailed before the April deadline. Tracking has last shown the package somewhere almost 6 weeks ago and I've not received my return receipt. I do not owe/nothing is due. If I note on the cover sheet 'possible duplicate' as well as the original mailed by date and a photocopy of my receipt will this be acceptable? I should have an automatic 2 month extension being overseas.
