Possibly - they do ask about it on the application. I doubt you get a huge boost though
Edit: Why are you even worried about a legacy boost? Based on your stats from your other thread, you are a shoo-in for IU. You will be a direct admit to Kelley if you choose to go there.
https://kelley.iu.edu/Ugrad/Admissions/Future/page39066.html
I’m sure your parents know a lot about IU, but feel free to ask me any questions if you have them. I just finished my sophomore year in Kelley as an accounting major.