Here's an arrangement I did for the song: 
    Then You Can Tell Me Goodbye
    This is a real good song to improvise on.
    Try using the G Maj or G Pentatonic scale.
    Part 2 has some Amos Garrett like harmony
    bends.
 
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    Part 1:

     Gmaj7    Em        Am            D
E ||--------------------3---0-----------------------------------|
B ||----------------------5---3---0-----------------------------|
G ||-----0-------0--------------5---4---0-----------------------|
D ||---4---0---4---0------------------5---4---0-----------------|
A ||---------2-------2----------------------5-------------------|
E ||------------------------------------------------------------|

  Part 2:  

     Gmaj7    Em        Am            D
E ||------------------------------------------------------------|
B ||--13^--12--7^-------12^--12^--12--10------------------------|
G ||--14^--12--8^-------13^--13^--12--11------------------------|
D ||------------------------------------------------------------|
A ||------------------------------------------------------------|
E ||------------------------------------------------------------|