Intro:

e]-5/7--5--3~--]
B]---------3~--]
G]-5/7--5--4~--]With Wah
D]-------------]
A]-------------]
E]-------------]

e]---------0----0~--]
B]---------1-/3-1~--]
G]-2brp0-0h2-/4-2~--]
D]-------0h2----2~--]
A]---------0----0~--]
E]------------------]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Verse main:

The verse's and chorus follow this chord pattern.

G (320003@1)            D (xx0232@1)             AmMomma (x02210@1)take this badge away from me
G (320003@1)      D (xx0232@1)          CI (x32010@1)don't use it anymore
G (320003@1)                    D (xx0232@1)              Am (x02210@1)    It's getting dark  to   dark to see
G (320003@1)      	D (xx0232@1)                  CFeel (x32010@1)I'm knocking on heavens door...

   ~~~~~~~~~~~~~~~~~~~~~~~~~

G (320003@1)      	D (xx0232@1)                  CFeel (x32010@1)I'm knocking on heavens door
G (320003@1)         D (xx0232@1)                 AmKnock (x02210@1)knock knocking on heavens door
G (320003@1)         D (xx0232@1)                  CKnock (x32010@1)knock knocking on heavens door
G (320003@1)         D (xx0232@1)                  AmKnock (x02210@1)knock knocking on heavens door
G (320003@1)         D (xx0232@1)                 CKnock (x32010@1)knock knocking on heavens door

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

However, a few people have asked me to tab out
what Clapton actually plays. This is a very tricky
task, but its a combination of these chord sequences.

~~1~~
e]--3x-3x---3x----10x-10x----10x-]these 2 chords
B]--3x-3x---3x----10x-10x----10x-]stay the same, 
G]--4x-4x---4x----11x-11x----11x-]but the last chord
D]--5x-5x---5x----12x-12x----12x-]E.C plays alternates
A]-------------------------------]from an Am to Cmajor
E]-3-------3-----10-------10-----]

Here's it in tab: 

~~2~~
e]--5x5x--5x-]   This is the Am
B]--5x5x--5x-]   Chord Clapton plays 
G]--5x5x--5x-]x2
D]--7x7x--7x-]
A]--7x7x--7x-]
E]-5-----5---]

~~3~~
e]--8X-8X---8X--]   This is the Cmajor
B]--8X-8X---8X--]   Chord Clapton plays
G]--9X-9X---9X--]X2
D]--10-10---10--]
A]--------------]
E]-8-----8------]


Verse leads:

Just chuck these little licks in whenever you feel
there approriate.  

e]-----------------------------]
B]-3-3-3-3-3-------------------]
G]-0-0-0-2-0----or--5-5-5-5-5--]
D]------------------5-5-5-7-5--]
A]-----------------------------]
E]-----------------------------]

e]--------------]
B]--------------]
G]-12~-12~-14b--] With wah 
D]--------------]
A]--------------]
E]--------------]

Solo: 

Ive tabbed it without using a slide, as I believe Clapton
overdubbed the slide solo with a guitar in an open tuning.
Heres how to play it in standard, not using a slide.

e]------------------------------]
B]-13b15~--13b15r13--11b12------]
G]-------------------------10b--]x2
D]------------------------------]
A]------------------------------]
E]------------------------------]

e]--------------------------------------------------]
B]-15b17--15b17--15~----15b17x--15-15b17-15b17-15~--]
G]--------------------------------------------------]
D]--------------------------------------------------]
A]--------------------------------------------------]
E]--------------------------------------------------]

theres a double tracked small section here, so just repeat
the first solo lick once.

e]---------------]
B]-6-6b8r6b8-6~~-]
G]---------------]
D]---------------]
A]---------------]
E]---------------]

~~Legend~~:

b=bend
r=return bend
x=mute, or choke
~=vibrato or let ring
/=slide
h=hammer on

~~1~~ refers to the G and D chords
~~2~~ refers to the Aminor chord
~~3~~ refers to the C chord

Now all you need to do is to match the numbers with
the chords I've layed out and play those sections
when the number corresponds to the chord and you'll
be away. Chuck those leads in when you feel the
need and you'll soon be rockin'

Just a quick note, Ive tabbed this out aimed towards
newer player's. Thats why it might seem simplistic.

Hope it helps guys!