Chords for the whole song are:
C#m A E G#
Intro: 
C#m A E G#
Verse:
C#m         A          E              G#
    What is for back behind trying to hold
C#m         A              E       G#
    Feeling better keep on moving on
C#m             A         E          G#
    You seem to be but it hurts sometimes
C#m         A              E               G#m
    Getting adult all your thoughts all so strong
    
C#m         A          E              G#
    What is for back behind trying to hold
C#m         A              E       G#
    Feeling better keep on moving on
C#m             A         E          G#
    You seem to be but it hurts sometimes
C#m         A              E               G#m
    Getting adult all your thoughts all so strong
C#m         A          E              G#
    What is for back behind trying to hold
C#m         A              E       G#
    Feeling better keep on moving on
C#m             A         E          G#
    You seem to be but it hurts sometimes
C#m         A              E               G#m
    Getting adult all your thoughts all so strong
Chorus:
C#m        A   
   What is for 
E          G#
   back behind
C#m                 A
What is for, what is for
E       G#
   back behind.
C#m        A   
   What is for 
E          G#
   back behind
C#m                 A
What is for, what is for
E       G#
   back behind.
C#m        A   
   What is for 
E          G#
   back behind
C#m                 A
What is for, what is for
E       G#
   back behind.
Verse: 
C#m       A           E             G#
  What is for back behind trying to hold
C#m         A              E       G#
    Feeling better keep on moving on
C#m             A         E          G#
    You seem to be but it hurts sometimes
C#m         A              E               G#m
    Getting adult all your thoughts all so strong
C#m         A          E              G#
    What is for back behind trying to hold
C#m         A              E       G#
    Feeling better keep on moving on
C#m             A         E          G#
    You seem to be but it hurts sometimes
C#m         A              E               G#m
    Getting adult all your thoughts all so strong
listen to the song here: https://www.youtube.com/watch?v=mcGYQYwqp0k