Most tabs have this played with Capo 2, but when Mark Salling plays the song in 
the show he is not using a capo. Here's how I play it.

Sweet Caroline
Glee Cast

B5              E
Where it began, I can't begin to know when
B5                           F#
But then I know it's growing strong
B5                 
Was in the spring
E
And spring became summer
B5                             F#
Who'd have believed you'd come along


B5              B/Ab            F#
Hands, touching hands, reaching out
         E            F#
Touching me, touching you


    B5          E
Oh, sweet Caroline
E                        F#
Good times never seem so good
B5        E                            F#
I've been inclined to believe it never would


  B5          E
Oh, sweet Caroline
E                        F#
Good times never seem so good
B5        E                            F#    E  Ebm C#m
I've been inclined to believe it never would Oh no no

B5   - x244xx
E    - 022100
F#   - 244322
B/Ab - 4244xx
Ebm  - x68876
C#m  - x46654