Mike, very helpful answer - thanks. I understand about the attachments - but presumably the actual Form 3115 that has to be included with the return can just be part of the efiled return (as TurboTax supports that form).
I understand that I need to send in Form 3115 and the supporting attachment. And that I need to do 8453 if I am sending anything by mail. What I am confused by is - do I go ahead and include Form 3115 in my efile OR only send it in the physical mail (for the 3115 for tax return - I mailed in the signed version,etc much earlier)
Thanks again - a confusing area, but I'd rather efile if at all possible
Gary
