What is going to happen to me

I'm 16 and I me and 3 others got caught in a neighbors house while they weren't home. We didn't get caught until the people got home two days after and a neighbor told them that there was a car parked infront of their house on friday (my friends car) We are friends with the kid who's house it was so for some reason the three other kids felt comfortable staying the night there. I went home late that night because I was uncomfortable with the whole situation. But anyways even though I left I still entered the house so I'm held accountable. We didn't break anything, take anything or make a mess, what is going to happen to me

If the kid that lived there was home and invited you in, probably nothing will happen. If the doors were unlocked and you entered uninvited or even more serious, you broke into the building, those are crimes and what happens will depend on the laws where you live. If you are arrested, they will explain the charges to you.

In situations where a group commits a crime together, what will happen is unpredictable because most often, everybody blames each other. You will just have to go through a period of anxiety until it gets resolved.

I hope you talked to your parents asap. Depending on what you didn't tell us, you may need a lawyer fast. If you're charged, an attorney will likely tell you to be honest first and take immunity. (If you do that, for your sake, I hope your friends don't live by the "snitches get stitches" rule.)