Sprinkle both sides of fish evenly with fajita seasoning. Heat oil in a large nonstick skillet over medium-high heat. Add fish to pan; cook 2 minutes on each side or until fish flakes easily when tested with a fork. Remove fish from pan. Add bell peppers and next 3 ingredients (through garlic) to pan; cook for 3 minutes, stirring occasionally. Add tomato; cook for 2 minutes. Stir in soy sauce; cook 1 minute. Add the fish; cook 1 minute or until thoroughly heated. Remove from heat.
Warm tortillas according to package directions. Spoon about 1 cup fish mixture down center of each tortilla; top each serving with 2 tablespoons pico de gallo. Serve immediately.