I leave the free edge alone if the client choose to, i give the option and explain to client that if she decide to leave the free edge there, it is going to be visible below the tip, some clients do care, others don,t and still want to keep their free edge.
Sometimes i offer sculpted to these clients instead of tip, but since sculpted is more expensive they sometimes refuse and prefer to paid for the tip. Here in my country, not all beauty salon offer sculpted, most offer only tip.
In training they told me, that free edge should be cut and file into shape to the well of the tip, the reasons were that free edge is visible below the tip and that leaving the free edge there could trap water and humidity increasing the risk for infections. That,s why i put some extra glue or a thin layer of acrylic to cover this and avoid future problems.