Verse:
G|---------------------------------|
D|---------------------------------|
A|---0-3-5-5-----0-1-3-3-1---------|
E|-1---------5-3-----------3-1-----| x3
G|-------------------------------|
D|-------------------------------|
A|---0-3-5---5-4---4-3-3-1-------|
E|-1-------3-----3---------3-1---|
G|---------------------------------|
D|---------------------------------|
A|---0-3-5-5-----0-1-3-3-1---------|
E|-1---------5-3-----------3-1-----| x3
Bridge:
G|----------------------------|
D|----------------------------|
A|-----0-1-1-0----------------|
E|-1-1---------3-1-1-1-1------|
[ Tab from: https://www.guitartabs.cc/tabs/e/etta_james/at_last_btab.html ]
G|--------------------------------------------------------|
D|--------------------------------------------------------|
A|--0-1-3-3-3-3-3-1-0-1-0-0-0-0-0-3-5-7-7-5-3-2-3-0-0-0---|
E|-1------------------------------------------------------|
G|-------------------------------------------------|
D|-------------------------------------------------|
A|-5-5-------0-3-3-3-4-5-5-----0-1-3-3-3-3-3-1-----|
E|-----5-3-3---------------5-3-----------------3-1-|
G|---------------------------------|
D|---------------------------------|
A|---0-3-5-5-----0-1-3-3-1---------|
E|-1---------5-3-----------3-1-----| x2
G|------------------|
D|------------------|
A|---0-3-5-5--------|
E|-1---------5-3~---|
G|------------------|
D|------------------|
A|-1/3/1/3/1/3/1----|
E|------------------|
Outro:
G|---------------------------|
D|----------0-2-3-3-4-5------|
A|---0-3-1~------------------|
E|-1-------------------------|
G|---------------------------|
D|---------------------------|
A|---0-3-5---5-4---4-3-------|
E|-1-------3-----3-----------|