There's plenty of info one Google search away, but easiest is probably to just ask one of the providers that will handle the registration for you.
I use subsidiefocus.nl, but feel free to shop around. Just keep in mind that there are sharks out there that will get you to pay E2000/yr and bind you for multi-year contracts; so shop around and be wary of AdWords advertisers.
Oh yeah; also make sure you inquire about the RDA subsidy which is not that big, but is often available on top of the WBSO subsidy.