Today, I'm taking two hours of paid annual leave, and going to work a little late.
「今日は２時間の年次有給休暇を取得し、少し遅れて出勤する。」は英語で「Today, I'm taking two hours of paid annual leave, and going to work a little late.」という表現が良いと思います。
年次有給休暇ーAnnual paid leave
取得ーGaining・Possession
出勤ーGoing to work・Being at work
アメリカ合衆国 
