明日は休みだから、早く起き___いいですよ。
Q. Which form expresses 'you don't have to get up early'?
Translation
Tomorrow is a day off, so you don't have to get up early.
Explanation
Non-necessity is 〜なくてもいい: 起きなくてもいいです. 〜なければ would start an obligation or condition, and ずとも is literary.