Well, the first word in the name of the trust is only 3 letters. The name control is those 3 letters, and the first letter of the next word, omitting the space, as per IRS instructions. This matches IRS form Cp 575B for this trust. So, I know what the name control is, and it is correct.
However turbotax throws an error about the 4th character, the 1st letter of the second word in the name of the trust. I finally tried just deleting that character, and having turbotax use a 3-letter name control that doesn't match IRS form CP575B, and then turbotax accepted & confirmed the e-file.
I don't know what's going on, this is my first time having to deal with name control, but it feels like a bug in turbotax.
