Thanks again guys for all the info. This is such a good resource.
I watched a very good you tube on tuning a table saw and this morning I decided I would do mine. I have had the saw for years and all I have ever done is try to keep the fence parallel to the blade. Oh my gosh...........was it ever out of whack. Haven't tried cutting any boxes yet so time will tell. I am going to take another suggestion and try not cutting them all the way through. Sounds like that might be a good idea.
Thanks again.