In the majority of countries the practice of hypnosis, Consulting Hypnotism, is self-regulated, which means no need for license.
It is important that you check or ask your hypnosis trainer in your city about the specific laws and regulation regarding Consulting Hypnotism.
In London, Ontario. Canada we always recommend our students to call themselves Consulting Hypnotists and make clear that they are not practicing hypnotherapy, unless they are Health Care Professional. No need for license in London, Ontario.