Please note! I didn't write this tab! All  credit for this should go to  phleigm, 
I was just playing along with it and the adjustments I made were simply how 
I thought it sounded best in accordance with the piano.
 I seriously just copy/pasted his tab and made my tweaks on the intro and the one FGCG run. 
Hope you enjoy!

C (x32010@1)         Am (x02210@1)        C (x32010@1)         Am|--------0-----------0-----------0-----------0-----| (x02210@1)|------1---1-------1---1-------1---1-------1---1---|
|----0-----------2-----------0-----------2---------|
|--------------------------------------------------|
|--3---------2-0---------2-3---------2-0-----------|
|--------------------------------------------------|

On the peak of the Am the open e is the easiest and smoothest to play in my opinion, 
however the piano sounds best if you play the 5th fret instead, however it breaks up 
the slur and sounds choppier. This is what it looks like:

C (x32010@1)         Am (x02210@1)        C (x32010@1)         Am|--------0-----------5-----------0-----------5-----| (x02210@1)|------1---1-------1---1-------1---1-------1---1---|
|----0-----------2-----------0-----------2---------|
|--------------------------------------------------|
|--3---------2-0---------2-3---------2-0-----------|
|--------------------------------------------------|

I've heard there was a secret chord
That David played and it pleased the Lord



F (133211@1)           G (320003@1)           C (x32010@1)           G|--------1-----------3-----------0-----------3-----| (320003@1)|------1---1-------3---3-------1-----------3---3---|
|----2-------2---0-------0---0-----------0-------0-|
|--------------------------------------------------|
|--------------------------3-----------------------|
|--1-----------3-------------------0-1-3-----------|

But you don't really care for music do you?

C (x32010@1)              F (133211@1)         G (320003@1)         Am (x02210@1)             F|--------0-----------------------0-----------1-----| (133211@1)|------1---1-------1-----3-----1---1-------1---1---|
|----0-------0---2-----0-----2-------2---2-------2-|
|--------------------------------------------------|
|--3-----------------------0-----------------------|
|--------------1-----3-----------------1-----------|

It goes like this, the fourth, the fifth
The minor fall, the major lift

G (320003@1)         Em (022000@1)        Am|--------3-----------0-----------0-----------0-----| (x02210@1)|------3---3-------0---0-------1---1-------1---1---|
|----0-------0---0-------0---2-------2---2-------2-|
|--------------------------------------------------|
|--------------------------0-----------0-----------|
|--3-----------0-----------------------------------|

The baffled King composing Hallelujah

F (133211@1)                     Am|--------1-----------1-----------0-----------0-----| (x02210@1)|------1---1-------1---1-------1---1-------1---1---|
|----2-------2---2-------2---2-------2---2-------2-|
|--------------------------------------------------|
|--------------------------0-----------0-----------|
|--1-----------1-----------------------------------|

Hallelujah, hallelujah

F (133211@1)                     C (x32010@1)         G (320003@1)         C (x32010@1)         G|--------1-----------1-----------0-----------3-----------0-----------3-----| (320003@1)|------1---1-------1---1-------1---1-------3---3-------1---1-------3---3---|
|----2-------2---2-------2---0-------0---0-------0---0-------0---0-------0-|
|--------------------------------------------------------------------------|
|--------------------------3-----------------------3-----------------------|
|--1-----------1-----------------------3-----------------------3-----------|
    F (133211@1)         C-G-C-G
Hallelujah, hallelujah



:ending:
   F (133211@1)                     C (x32010@1)         G (320003@1)         C|--------1-----------1-----------0-----------3-----------0------0--| (x32010@1)|------1---1-------1---1-------1---1-------3---3-------1---1----1--|
|----2-------2---2-------2---0-------0---0-------0---0-------0--0--|
|---------------------------------------------------------------2--|
|--------------------------3-----------------------3------------3--|
|--1-----------1-----------------------3---------------------------|

c (x3101x@1)               AmI've (x02210@1)heard there was a secret chord
     c (x3101x@1)               AmThat (x02210@1)David played, and it pleased the Lord
  F (133211@1)              G (320003@1)           c (x3101x@1)      GBut (320003@1)you don't really care for music, do you?
  c (x3101x@1)                 F (133211@1)         gIt (355333@1)goes like this, the fourth, the fifth
    Am (x02210@1)            FThe (133211@1)minor fall, the major lift
    G (320003@1)               Em (022000@1)      AmThe (x02210@1)baffled king composing Hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G-C-G
Hallelujah, Hallelujah

c (x3101x@1)               AmYour (x02210@1)faith was strong but you needed proof
     c (x3101x@1)               AmYou (x02210@1)saw her bathing on the roof
  F (133211@1)              G (320003@1)           c (x3101x@1)      GHer (320003@1)beauty in the moonlight overthrew you
  c (x3101x@1)                 F (133211@1) GShe (320003@1)tied you to a kitchen chair
    Am (x02210@1)            F (133211@1)She broke your throne, she cut your hair
    G (320003@1)               Em (022000@1)      AmAnd (x02210@1)from your lips she drew the Hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G-C-G
Hallelujah, Hallelujah

c (x3101x@1)               AmMaybe (x02210@1)I've been here before
     c (x3101x@1)               AmI (x02210@1)know this room, I've walked this floor
  F (133211@1)              G (320003@1)           c (x3101x@1)      GI (320003@1)used to live alone before I knew you
  c (x3101x@1)                 F (133211@1)         GI've (320003@1)seen your flag on the marble arch
    Am (x02210@1)            Flove (133211@1)is not a victory march
    G (320003@1)               Em (022000@1)      AmIt's (x02210@1)a cold and it's a broken hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G-C-G
Hallelujah, Hallelujah

c (x3101x@1)               AmThere (x02210@1)was a time you'd let me know
     c (x3101x@1)               AmWhat's (x02210@1)real and going on below
  F (133211@1)              G (320003@1)           c (x3101x@1)      GBut (320003@1)now you never show it to me do you?
  c (x3101x@1)            F (133211@1)     GRemember (320003@1)when I moved in you?
    Am (x02210@1)            FThe (133211@1)holy dark was moving too
    G (320003@1)               Em (022000@1)      AmAnd (x02210@1)every breath we drew was hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G-C-G
Hallelujah, Hallelujah

c (x3101x@1)               AmMaybe (x02210@1)there's a God above
     c (x3101x@1)               AmAnd (x02210@1)all I ever learned from love
  F (133211@1)              G (320003@1)           c (x3101x@1)      GWas (320003@1)how to shoot at someone who outdrew you
  c (x3101x@1)                 F (133211@1)         GIt's (320003@1)not a cry you can hear at night
    Am (x02210@1)            FIt's (133211@1)not somebody who's seen the light
    G (320003@1)               Em (022000@1)      AmIt's (x02210@1)a cold and it's a broken hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G
Hallelujah, Hallelujah
    F (133211@1)         AmHallelujah, (x02210@1)Hallelujah
    F (133211@1)         C-G-c
Hallelujah, Hallelujah