sending off religious exemption to preschool...scared

hello,

i'm so nervous about doing this that i just wanted to write and maybe someone can calm my nerves. I'm sending off the religious exemption letter from massachusetts to my childrens preschool. I'm so afraid they'll reject my children. I don't like to make waves and I know this will. Does anyone know if my 3yr old twins can be rejected? Any info or help would be greatly appreciated.!

Thank you