This is my version just to moke it more complicated and it sounds nice. 
D+ and A+ is explained at the bottom
   D+     D     G     A     A+     E
D|+12+| D|12| E|15| A|12| |+12+| E|12|
verse 1:
D+                 G         D+
Amazing grace how sweet the sound
                         A+
That saved a wretch like me
   D+                G      D+
I once was lost but now am found
               A+   D+
Was blind but now I see

verse 2:
D+                 G                D+
twas grace that taught my heart to fear
     A+                D+
and grace my fears relieved
                  G          D+
how precious did that grace appear
            A+     D+
the hour I first believe

Chorus:
               G                 D
My chains are gone Ive been set free
       G                      D
My god my savior has ransomed me
            G               D
And like a flood his mercy reigns
          E    A+      D+
Unending love amazing grace

Verse 3:
D+              G            D+
the lord has promised god to me
                    A+
his word my hope secures
    D+             G           D+
he will my shield and portions be
            A+     D+
as long as life endures

Chorus: x2
               G                 D
My chains are gone Ive been set free
       G                      D
My god my savior has ransomed me
            G               D
And like a flood his mercy reigns
          E    A+      D+
Unending love amazing grace

verse 4:
D+               G                  D+
the earth shall soon dissolve like snow
                   A+
the sun refuse to shine
   D+          G       D+
but god who called me here bellow
           A+     D+
shall be forever mine

For both +'s yor just put your finger on the string above that fret.
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