A. This is a rather specific question that your dentist will be able to guide you on.

My point of view would be as follows:

It all depends on the type of bite you have. If you have a “heavy” bite and your teeth show wear then my advice is not to prepare the edge. If you have mild to no forces on the cutting edge ( some people ‘s front teeth do not touch) then overlapping the incisal edge would be fine. Your dentist may have their hands tied if you have very discoloured teeth. This may force them to prepare the edge to cover up the discoloration.
At the end of the day your dentist will take all of these factors into consideration and hopefully give you an excellent end result.

Regards,