How are you doing it, removing the turbo or just dropping it down and doing it in situ?
If dropping it down, you'll need a new turbo - manifold gasket, and that's about it I think.
If removing to fit the actuator, you'll need new turbo - manifold gasket, turbo - downpipe gasket, oil drain gasket, 4x oil crush washers, 7x water crush washers, and a manifold gasket just incase you have to whip it off for some reason