Hi Maya,
There is no contraindication to having laser hair removal while using a topical vitamin A derivative (tretinoin, other retinoids, retinols, etc.). However, it is recommended that you stop use of any/all of these topical vitamin A derivatives at least 5-7 days prior to waxing the areas. If you are at all unsure as to whether or not one of the topical products that you are using contains a vitamin A derivative/retinoid/retinol,please ask your dermatologist prior to scheduling a waxing appointment.
But, again, undergoing laser hair removal while actively using one of these topical medications is not contraindicated.
Good luck and take care!