I agree, it IS a shame to have to print -- GULP -- 500 pages! But I hadn't seen this question researched before, so I did some legwork. The 8453 is the most logical place, but the instructions specifically state "If you are required to mail in any documentation not listed on Form 8453, you can’t file the tax return electronically." (Here, you're not required to mail it in, you just can't efile it with TT, since TT can't do a pdf.) And there's no IRS guidance other than the link you found during your own research. Since this is a new tax reporting issue, the IRS most likely will want to see these documents from taxpayers and, if I can be frank, documents that the IRS receives with Form 8453 arent' looked at by IRS folks very closely, anyway. I wish I had a more satisfactory answer for you. If you should learn something different in the future, please post back here. And look back here in the next couple of days, as a TurboTax "SuperUser" may know of a solution of which I'm not aware.
