Laser movement not accurate in GRBL

I have a yorahome silverback. I installed the laser on it and it doesn’t move to same area that I have it setup on the working grid. I have the working area as 24"x24". when I make a square or any shape. Put directly in the center, (12x12). it doesn’t come close. It moves about 6"x4". The square or circle are cut to the proper size, but the movement is way off. Can someone tell me what I can do to remedy this. Thanks

Check this thread and see if your symptoms are comparable.