How do I add a statement to the 11120 S return related to the reason for the amended return

[efecci]

I have the box checked that this is an amended return. I am just trying to attach a statement to the return. I can't seem to find how to add a statement to the return

[dkh]

Go to EF Center,  highlight client you want pdf attached then select EFile from tool bar at top, select Attach pdf file