Great song.  Love that little plaintive, pre-chorus lick.  This sounds right to me.

Intro: A

Verse:

A                        F                G
Irresponsibility's my closest friend
A                                                       F        G
Forget my duty I couldn't give a shit (obligation)
E                                 A
Tell my about the city ordinance
E                                   A
Tell me that we're insubordinate

Pre-Chorus/Guitar Lick:
|--------------|
|--------------|
|---7-6-2-4----|   x2
|--------------|
|--------------|
|--------------|

Plan tomorrow, money to borrow

Chorus:

               D      A      D     A      E
I couldn't care less, care less
              D     A      D     A       E
Couldn't care less, care less
      D    A     D     A      E
I'm careless, careless

And that's the way I stay

Verse:

I never pay attention, watch my step
Never pay my bills, way in debt
Tell my about the fuckin' ordinance
Tell me that we're insubordinate

Pre-Chorus/Guitar Lick:

Plan tomorrow, money to borrow

Chorus:

I couldn't care less, care less
Couldn't care less, care less
So careless, careless
Yeah that's the way I stay

Bridge:

E D E D E D E E

Chorus:

Stay
Careless, careless...
Yeah careless is the way I'll stay

End on A.