It's a good question, not a stupid one.
하세요 is politer than 해요.
Let me break it down so that you could see the difference.
Those two are from the verb 하다, right?
하 + ㅓ요? = 해요?
하 + 시(honorific suffix) + ㅓ요? = 하세요?
(하 : verb stem /ㅓ요 : interrogative ending in standard politeness level)
You can make sentence be more polite by adding the suffix 시.
하죠?(하+지요?) is like...
....., right?
ex)
오후에 공부하죠?
You study in the afternoon, right?