Usually (iirc) it corrects itself when you turn lock to lock (the whole 900 degrees), going past the limit set by LFS/profiler.
Quote from Zac86 :Ive tried everything and it always thinks its centered a little bit to the left please help! Go into 'Options/Controls/AxesFF' and unlock the calibration. Turn your wheel from lock to lock, press all your pedals - Centre your steering and then lock the calibration. Your good to go again