You can disregard everything in this thread. "opened the guest house for vacation rentals" means that more than likely, this is a SCH C business the same as your AirB&B rental is. We have both wasted an inordinate amount of time now, because of the lack of clarity and the omission of relative facts from the start.
Basically, you will indicate that you stopped using your existing assets and removed them from service entirely, at least one day before the new building became available. Then you will enter a completely new asset that goes "in service" at least one day after you removed the old assets from use, and the new asset entry will include both physical structures and the major changes there are you have more total square footage to deal with on all fronts. That will of course, change the percentage of floor space used for business.
