He doesn't need to know the truth.

You don't have to know that.

You don't need to know that.

You don't want to know that.

I don't want it.

I don't need this.

тебе не нужно это делать перевод на английский

You dont' have to do that.

не нужно извинений перевод на английский

no need to apologize

There's no need to apologize.

тебе не нужно на это отвечать перевод на английский

You don't have to answer that.

I don't need it anymore.

не нужно мне об этом напоминать перевод на английский

I don't need to reminded of it.

I'm late. I know. I don't need to be reminded of it. / Я опоздал. Я знаю. Не нужно мне об этом напоминать.

не надо перевод на английский

Don't do it.