rudderrudderrat: A330 FCOM3.04.32p5/6 OPERATION WITH NOSEWHEEL STEERING OFFSET
The tolerance was +-0.5o NWS offset = 2.5o rudder trim to taxi straight.
Outside that range the limit was 4 - 10 degrees to use the procedure and the trim had to be reset to zero prior to take-off.
PS I have never seen this procedure on the A320