Hey... Well i love this song and havnt been able to find a tab of it so after watching 
videos closly i have come up with something that sounds pretty good.

Tuning: Standard
CAPO: Hey plays with one on the first

There are two basic parts for the verse that are just repeated throughout the song...

Part 1
e----0---0-0----5p0-0-5p0-0-5p0-0-5p0--------|
B----1---1s3---------------------------------|
G----0h2-2s4---------------------------------|
D----0h2-2s4---------------------------------|
A----0---0-0---------------------------------|
E----x---------------------------------------|

Part 2
e----000---0---00-00--0-000------------------|
B----111---1---11-11--1-111------------------|
G----222---2---20-0h2-2-00h2-----------------|
D----222---333333-33--3-333------------------|
A----x-----333333-33--3-333------------------|
E----x-----0---------------------------------|

Chorus: Am, G, F, C(Barre)

(part 1)
In the quiet of the shadow
(part 2)
In the corner of a room
(part 1)
Darkness moves upon you
(part 2)
Like a cloud across the moon

You're a-wearing all the silence
Of a constant that will turn
Like the windmill left deserted
Or the sun forever burn

Am  G         F    C
So don't forget to breathe
Am   G     F   C
Don't forget to breathe
Am      G
Your whole life is here
  F             C
No eleventh hour reprieve
Am     G          F(hold)
So don't forget to breathe
E(hold)
 Keep your head above water
But don't forget to breathe

(part 1)
(part 2)


And all the suffering that you've witnessed
And the hand prints on the wall
They remind you how it's endless
How endlessly you fall

And the answer that you're seeking
For the question that you found
Drives you further to confusion
As you lose your sense of ground

So don't forget to breathe
Don't forget to breathe
Your whole life is here
No eleventh hour reprieve
So don't forget to breathe

Keep your head above water
But don't forget to breathe

Breathe....

Don't forget to breathe
Don't forget to breathe
You know you are here
But you find you want to leave
So don't forget to... breathe

Just breathe
Just breathe
Just breathe...
Just breathe...
Just breathe...