This is to send in two forms on my mailed-in filed 2016 1040 (filed late) that they SAY are missing but which WERE included in the return. They say you will not receive acknowledgement on the fax; at least if I mail them I can track receipt. But seems like people on here fax things in all the time no problem and by calling can get a confirmation they were received. I'm suspicious they'll say they didn't get the fax, because it seems like they are just trying to find a reason to delay my large refund since I know beyond a doubt these forms were indeed part of my filed return.
