The past few years I've had to send my return via certified mail. The one year I finally get the ip pen assigned so I can efile it gets rejected. It said one of my childrens ss# was already filed. I have for kids all of which cannot be claimed by someone else legitimately because they live with me and only I care for them. I don't even know which child it is. I've called the IRS to just get h in ng up on for hours
