And welcome to the user group. I hope that you will find what you need here. But I also hope that you will write a little introduction about you self in the Introduction Forum. The members here like to help you, but it’s always easier to help someone if they know a little more about you. Reading your little post here make me think that we here have someone who have never done a NAV project before, and maybe even haven’t had any training. Am I wrong?
I can only recommend that you look into getting the basic Microsoft Dynamics NAV Certifications before starting your project. There is much more about that in the “NAV certification” forum.
But otherwise I can recommend one of our members online NAV book: http:/wiki.dynamicsbook.com