Here we go. Let's see what we got here.
Type: Invincible-class VTOL Carrier
Chassis Type: Naval Vessel (Large, Template D)
Tonnage: 23,590 tons (Note: When calculating available space, round down. 23,590 tons results in 270 spaces)
Equipment Rating: E/X-X-F (Note: Okay, you claimed Tech Rating B but used Tech Rating C structure and engine, so I changed that. Also, the Thunderbolt launcher restricts availability F)
Equipment Mass
Chassis/Control: 4612
Engine/Trans: ICE 5520.5 (Note: Here you have to round up to the nearest half-ton, not ton)
Cruise MPs: 3
Flank MPs: 5
Heat Sinks: - 0
Power Amplifiers: 0
Fuel: 12,500 km 6901
Turret: 2 (Note: Calculate weight of each turret, add them, then place result here)
Armor Factor (BAR 6): 1268 61
Front: 42 206
Front R/L: 42 206
Rear R/L: 42 206
Rear: 42 206
Turret 1: 42 16
Turret 2: 42 16
Weapons and Ammo Loc Mass
Autocannon/5 T1 8
Autocannon/5 T2 8
Ammo AC/5 (12000) B 600
Anti-Missile System F 0.5 (Note: AMS is 0.5 tons, not 1 ton)
Anti-Missile System T1 0.5
Anti-Missile System T2 0.5
Ammo AMS (8004) B 667
Thunderbolt-20 F 15
Thunderbolt-20 F 15
Ammo Thunderbolt-20 (450) B 150
Crew:
Cargo:
1003.5 tons (Note: Potable water and fuel storage have cargo capacity equal to Tonnage x 0.91. I'll leave this open for your interpretation)
1500 tons 10 fighter bays
600 tons 12 light vehicle bays
Notes: Features Tech Rating C chassis, engine and armor, flight deck (2500 tons), Lift Hoist (3 tons, Right), 10 field kitchens (30 tons, I'm going to leave this as is), MASH with 5 theaters (7.5 tons), Communications Equipment (15 tons), 50 infantry bays (250 tons).
Okay! I've cleaned it up, so I'm going to check weight and.... wow. This thing is overweight by 880 tons. Come to think of it, you listed 1500 tons for the flight deck. Do you think there is anything you can remove to get the target weight? Oh, and as for space, you used about 76 spaces, so you are good. Very roomy in that regard.