It‘s very late now.I need ()(go)home at once

It‘s very late now.I need【go/ to go】home at once
原因：
need可以做情态动词,后面接动词原形；也可以做实义动词,后面接带to不定式.
这一句话中,need没有其他特定行驶或搭配限制,因此,看做情态动词或实义动词都行.
如果改为否定：
It‘s very late now.I【 don't 】need【 to go】home .有助动词否定式限制,只能看做实义动词.
祝你开心如意!