Yea you need to put ingredients on labels on your individual products made using the lotion base/soap base. You shouldn't use storebought bases. i'm not sure if you're asking about adding fragrance to say...a bottle of white rain body wash....or if you are asking about adding it to goatsmilk liquid soap base from brambeberry or some similar soap supply store. The whole purpose of making handmade soap, lotions and other products is that you avoid sulfates and other harmful chemicals from being in the product you produce. People who buy handmade bath products buy it believing it's good wholesome stuff, you really shouldnt mislead them by using commercial products as a base. If you are using a soap base or lotion base from a soap supply store, most of them have a list of ingredients attatched, when you do your label, put those ingredients just as they are listed + whatever ingredients you add yourself. Remember when you are making lotion specifically you need to make sure everything you are working with is completely sterile because bacteria tends to grow in lotions....using a preservative is also important in those.