Not sure on the Chorus riff but pretty confident the chords are correct.
So Long
Fischer Z
Intro: C G F F C G F F
C G F
When I read your letter I coudn't believe that you'd gone.
C G F
I dialled your number but no one answered the phone
G F
I asked your friends to tell me if they knew where you were,
G F
They said they thought that you were ill.
Break: C G F F C G F F
C G F
I hired a detective to try and find out where you are.
C G F
He managed to trace you, he said you were living in France.
G F
A watchman saw you climb into someone elses car
G F
And drive off laughing in the night.
[ Tab from: https://www.guitartabs.cc/tabs/f/fischer_z/so_long_crd.html ]
Chorus
F C
Why didn't you tell me.
F C
Not leave me this way.
F C
You could have told me
F C
Not waited for so long.
I've tried to forget you but I find myself walking the street.
I went to the doctor and he gave me something to sleep.
I sent you telegrams but you haven't aswered one.
Your mother told me I best leave you well alone.
I hope your satisfied now you've done this thing to me.
I hope you're pleased with what you've done.
Chorus
Why didn't you tell me.
Not leave me this way.
You could have told me
Not waited for so long.
G F
For so long I never realised just exactly who you are.
G F
For so long I never realised the girl I had before.
G F
For so long I hope you're satisfied you won't hear from me again.
G F
For so long I hope you're pleased with what you've done.
Chorus
Why didn't you tell me.
Not leave me this way.
You should have told me
Not waited for so long.
F G C to finish
Riff played during the Chorus
E-|-----------------------------------|
B-|-----------------------------------|
G-|-----------------------------------|
D-|------------2----------------------|
A-|----3---3-5---5-3-2-0--------------|
E-|----------------------3-5----------|
