I am still in the process of figuring this out myself. I can turn with rudders, but not very sharply or controlled it seems like... and I don't have toe breaks on my rudders so I've set buttons in the controls for left and right wheel break, but it seems they don't work when in-game. I tried to use buttons on my HOTAS and on the keyboard both with the same non-effect. I press the button/key and my plane will still keep rolling straight as if nothing is being pressed. Anyone have any ideas?
As said in the message just above yours
the Allied planes don't use the left/right toe brakes key binding but the single brake and rudder. They still have differentiial brakes, it's just the control setup is not the same as the Axis aircraft in-game.