B757 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; General Evacuated
Aircraft
On landing roll out took the controls from the FO (First Officer) who been the flying pilot for the approach. Made the turn onto taxiway and we were approaching the ramp. I was looking outside to taxi but saw the red Fire EICAS indication and said that we have a fire. As we were turning onto taxiway the cockpit filled up with smoke.  Due to the smoke in the cockpit and a FIRE indication followed CFM procedures and evacuated the aircraft. We informed Tower and asked for fire equipment to respond. We ran the Emergency Evacuation QRH procedure and deployed the slide on the left side of the aircraft. We evacuated down the slide and went to a spot in front of the aircraft while the fire fighters climbed aboard the aircraft.  We were then taken to a hospital for medical evaluation due to smoke inhalation. Unknown source of smoke during taxi accompanied with fire warning.
Upon taxiing off of [the runway]; I was looking out to the right to clear on to taxiway. There was a fire warning indication and the cockpit filled with smoke/fumes. Once on [the taxiway] the Captain set the brake; I notified the Tower that we [had] smoke in the cockpit. I confirmed with the Tower that we were requesting emergency equipment. I ran the after landing checklist; the Captain ran the shutdown checklist. We both ran the QRH Evacuation checklist. The Captain opened the door and we evacuated via the slide. Waiting for the final MX (maintenance) report for what caused the Fire Warning and Smoke/Fumes in the Cockpit.
B757 flight crew reported evacuating the aircraft on the taxiway after receiving a fire indication on the EICAS and smoke of unknown origin in the cockpit.