which is the best for future *CA or *CS
Hello
Both CA and CS are good for your future, the thing is what you decides matters the most.
In most cases, there isn't a point to get both of these certifications. Both credentials offer different opportunities, but in most cases a CA can do everything that a CS can do. Thus, if you are going to get one certification, you are better off just becoming a chartered accountant.
Hope my answer helped you.