The answer to 'how to get rid of wasp' is to first identify and remove any active wasp nests on your property. Wasps can build nests in attics, under eaves, in trees, or other hidden areas. Once the nest is located, you can treat it with an insecticide spray specifically made for wasps. Be very careful when approaching the nest, as wasps will become aggressive if their home is threatened.
If you are unable to safely locate and treat the nest yourself, it's best to call a professional pest control company. They have the proper equipment and training to safely remove wasp nests without putting your family at risk. Trying to remove a nest on your own without the right precautions can result in painful stings.