To be certain, you should:
* Consult your owner's manual: This is the best resource for the precise location.
* Use a repair manual: A Haynes or Chilton manual for your year and model will have diagrams and photos.
* Search online for pictures: Searching "1982 Lincoln Town Car power steering reservoir location" with images will likely yield helpful results.
Remember to be cautious when working near the engine compartment. The engine and other components will be hot if recently run.