There is no soul in a human. Just a bunch of systems nudging each other to action. What people call soul is literally the same as the concept of personality. In essence, the way all systems in your body have been calibrated to exist.

I believe that the moment an artificial inteligence is going to "receive" a soul, is the moment it is going to be made to sustain itself. Either as a larger package (some bots working to keep an AI farm running) or as an individual (a bot which is tasked with not only fulfilling human desires, but also sustaining itself)