.. in the case of our school district, if your kids are already in PS and you decide to pull them, all you have to do is submit a letter to their school or, as I did, fill out a withdrawal form and where it asks the reason (usually because the child is moving), simply put "homeschool."
I was told that the attendance officer would be contacting me shortly. It's been 1-1/2 years and maybe the birds ate the breadcrumbs I dropped along the way from the school to my house or something. If not, they forgot about us.
:: sniff ::
Funny, but I never got one....... it was an intimidation letter and they knew me better than to send one........ lol