I had the exact same problem. Turbotax Business does not support e-filing Amended 1041s. As a test, I saved the amended 1041 as a tester file, then changed the FEIN to a fake number. Turbotax Business recognized the fake return as an amended return. Although I certainly was not going to e-file the fake return, as soon as I let the program know that I wanted to e-file, a window popped up saying that I could not e-file an amended 1041. I wish that the same window popped up when I tried to e-file the actual amended 1041. It would have save a lot of time. Oth
