I'm having the same problem trying to get the Client letter and the K-1 recipient letter to NOT print with the filing copy. I have no boxes checked in the "Control which letter print" setup and yet it is still printing. What a waste of paper or time having to go in and manually deselect these each and every time I print a return. Called Tech Support and they couldn't figure it out either.
I finally stopped printing Filing instructions and it no longer prints the letter. I know there used to be a
place on the bottom of the Information sheet that you could check to stop the letter printing. I don't know about the K-1 letter, I have not had one yet.