Game concept
Tax Collector
The game also links it as Tax Collectors.
From the game's encyclopedia
A Tax Collector enables Tax Jurisdictions to function.
Their Aptitude determines the amount of Taxes and Levies they collect for their Liege.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Tax Collector is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A Tax Collector enables Tax Jurisdictions to function." It is part of Tax Jurisdiction. The game also links it as Tax Collectors. Patch 1.20.1.2, from game/common/game_concepts/03_fp3_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/03_fp3_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.