If I delete my iMessages from my macbook, does it also delete on my iPhone?

I had my phone taken from me by my parents and they want to look through it but i have messages i don't want them to see so i deleted them on the iMessage app on the macbook will it also delete it on my iPhone?

No, it won't. You have to get your phone and delete it there.

Sounds like it is time to fess up… Better to come clean that to have to have them jump through hoops to get the info.