Call your local phone number for the dog warden/animal control - they can give you a list of places to register for tags. We do it at either the Humane society or the pet shop.
if you menat, how do dyou register a dog with the AKC, as someone said, your breeder will provide you with the pup's registration number if it's never been registered before. There should be info on the back about where to send documents to. you have to pay a bit extra if you want a Certified Pedigree- but it's kind of neat to see who your dog's ancesters were.