Where is the pilot light on my Carrier Infinity Series 48XT dual fuel hybrid furnace/Air Conditioner?
Pilot lights went out of style sometime in the 90s

Your furnace, being a modern-day unit, does not use a pilot for ignition.  Instead, what you have is most likely what's called a direct spark ignition (DSI) system that has the furnace board trigger a spark at the appropriate time to light the gas -- it indeed is a computer control system!

As to how you turn this thing on -- you should be able to turn on the serviceman's switch/disconnect and the thing will be ready and waiting for a call for heat.  Your system won't call all the time though, because it's a hybrid system with gas backing up a modulating heat pump -- this means that the gas will only kick in when the outdoor reset shuts down the heat pump (if it gets cold enough, the heat pump can't run), or the heat pump itself is inoperable.