The answer, at the moment, is sort of. You have to use Mission Architect (MA) for it. You can definitely do "vacuum" impact point calculations, that's easy. (See the Mission Architect example included called "Mission to Minmus" or something to that effect.) A vacuum impact point is the point at which a trajectory intersects the ground without accounting for atmospheric drag. However, atmospheric modeling is somewhat primitive at the moment. You could try using the aerobraking event type in MA, though I think that event doesn't like it when you never show up out of the atmosphere again.
I would start by just modeling your reentry using the two body assumption (so just a basic coast, and coast down to an altitude of 0), and then come up with a way to adjust your pre-entry orbit to account for the fact that drag will pull that impact point a bit closer to the point where you hit the atmosphere. Honestly, depending on your flight path angle at entry interface, the vacuum impact point may not even be a terrible assumption. Give it a go and let me know how it goes. I'm happy to help you come up with a good solution if I can.
That sounds great, thank you! I'll definitely have a go at it and see how it plays out.