Chord/Tab song: Knockin’ on Heaven’s Door

hey, the lyrics are slightly not correct but the chords are. dont mind if theres a
mistake please. im only 14. hehe.
[G]Momma take this[D] badge away from[Am] me
[G]I don't u[D]se it anymore[C]
[G] It's getting dark [D] to dark to see[Am]
[G]Feel I'm knockin[D]g on heavens door[C]
[G]Knock knock [D]knocking on heavens [Am]door
[G]Knock knock [D]knocking on heavens d[C]oor
[G]Knock knock [D]knocking on heavens d[Am]oor
[G]Knock knock [D]knocking on heavens [C]door
[G]Momma take[D] these guns away fr[Am]om me
[G]I can't [D]shoot them anymo[C]re
[G]That long bl[D]ack cloud is com[Am]ing down
[G]Feel I'm[D] knocking on heavens [C]door
[G]Knock knock [D]knocking on heavens [Am]door
K[G]nock knock [D]knocking on heavens [C]door
[G]Knock knock [D]knocking on heavens d[Am]oor
[G]Knock knock [D]knocking on heavens d[C]oor
( Tab from: http://www.guitartabs.cc/tabs/e/eric_clapton/knocking_on_heavens_door_crd.html )