Answer:
conquered England
centralized the government in England
set up a taxation system in England
Step-by-step explanation:
William of Normandy was the Duke of Normandy that eventually conquered England, he commanded the creation of the doomsday book which was basically a book that contained the property of all English citizens and the taxation that they´d have to pay for that, given that William needed money to pay to raise an army, so he had to set up a taxation system, and he centralized the government in England.