The transmission fluid dipstick on a 2000 Lincoln Town Car is typically located on the passenger side of the engine compartment. It's usually a long, slender dipstick with markings for "add" and "full". Look for a dipstick that's different from the engine oil dipstick; it might have a different color handle or markings indicating "ATF" (Automatic Transmission Fluid).
However, be aware that some 2000 Lincoln Town Cars might not have a readily accessible dipstick. The location and accessibility can vary slightly depending on the exact engine and transmission type. If you can't easily locate it, refer to your owner's manual for the precise location and instructions. The manual will be your best source of information.