I found out my problem.  When you go to the list of Types when you hit Add attachment, the list of types are listed.  When that list appears, the first type is Other and then when you scroll down there are other items that don't apply.  I believe that TT has a flaw in the program, because if you scroll up from Other, the type O/S return appears.  My feeling is that when you click on a list, the first item should be at the top of the list and not start in the middle of the list.  It was such a simple thing that I didn't notice that I had to scroll up.  I just made the assumption that when a list appears, it starts at the top not in the middle.

Thank you for trying to help me.  I wasted hours on such a simple solution.  I do think that TT should make a change.