John Gill Commentary 2 Samuel 20:24

"and Adoram was over the men subject to taskwork; and Jehoshaphat the son of Ahilud was the recorder;" — 2 Samuel 20:24 (ASV)

And Adoram [was] over the tribute
Or over those that collected and brought it, as the Targum; this was a new office, and which respected both the revenue he received from his own people, and the tribute brought him from the nations conquered by him:

and Jehoshaphat the son of Ahilud [was] recorder ;
who was in this office before, and now continued and established in it, (2 Samuel 8:16) .