Your question is too open-ended to answer properly.
What is profitable in one part of the world is not necessarily profitable in another. The location in your profile is linked to a place in Canada. Is that where you are actually located? If so, do you realize you must get your soap recipe approved before you can sell? Have you researched the laws about selling soap and operating a business in your region?
Your question implies you have not made any soap or have only just gotten started. If you do not have any experience making soap, you need to gain that experience before you actually sell soap. By making soap for yourself and friends, you will learn what fats are readily available in your area, learn where to source the alkali needed, learn how to ensure your soap is safe to use and works best with your local water, and learn what local customers want. Without that knowledge, you have no business selling soap.