Finding the nest is the first step in getting rid of bothersome bees. As the sun sets, the bees will return to their hive and you can follow them. If you are looking to kill the bees, spray the hive at night, when the bees are settled for the night, with insect-killing poison that can be found at your local hardware store.
Another method for killing bees is to place a bug zapper or fly tape directly outside the opening into the hive. This will kill bees as they move in and out of the hive, and all you will have to do is replace the fly tape occasionally and sweep up the zapped bees. This should only take a few days. Spray the hive with insect poison to kill any remaining bees.
An additional option for killing the bees is to block the entrance to the hive. It is important to wear thick, protective clothing to avoid getting stung. Also, do this in the evening, when the bees are less active and have returned to their hive. You can block the entrance to the hive with foam spray or by stuffing a rag soaked in rubbing alcohol into the entrance.
If you are worried about dealing with the bees yourself, calling a professional exterminator is a great option. Conversely, if you do not want to kill the bees but would like to be rid of them, calling a beekeeper to remove and relocate a honeybee bee hive is often free or at least less expensive than an exterminator. In addition, you will be contributing to someone's livelihood and your local honey supply.
With any of the above methods, it is vital to remove the hive once the bees have been killed. If the hive is not removed, it is possible for a new colony of bees to take up residence inside the old hive later in the season. Also, it attracts varmints such as mice and rats. However, be sure that the bees are dead before attempting to remove it, and wear thick, protective clothing when handling the hive, in case any bees remain.