The tabs up already were helpful but I thought they were a little off. This is 
just my take on the song.

The song is played with a capo on the 7th fret and all the chords are relative to that.

Intro:
e|-0--0-0-0---------|
B|-1--1-1-1---------|
G|-0--0-0-0---------| x2
D|-2--2-2-2-0h2-0h2-|
A|-3--3-3-3---------|
E|------------------|

CIf (x32010@1)you should be

Amthe (x02210@1)last Autumn leaf

F (133211@1)                   Changing (x32010@1)from the tree,

CI'll (x32010@1)still be here

Amwaiting (x02210@1)on the breeze

F (133211@1)                     Cto (x32010@1)bring you down to me.



Em (022000@1)               FAnd (133211@1)if it takes forever,

Em (022000@1)          AmForever (x02210@1)it'll be...

Em (022000@1)               FAnd (133211@1)if it takes forever

GForever (320003@1)it'll be..

Bridge:
C C Am F
C Em F G

CAnd (x32010@1)if you should be

Amthe (x02210@1)last seed in Spring

F (133211@1)                  Cto (x32010@1)venture out a leaf

CI'll (x32010@1)still be here

Amwaiting (x02210@1)on the rain

F (133211@1)                       Cto (x32010@1)warm your heart for me.



Em (022000@1)               FAnd (133211@1)if it takes forever,

Em (022000@1)          AmForever (x02210@1)it'll be...

Em (022000@1)               FAnd (133211@1)if it takes forever,

GForever (320003@1)it'll be...

C (x32010@1)