Should I check the box "someone can claim me as a dependent"?

My parents are not claiming me as a dependent even though I believe I qualify to be one (most of my support during the 2020 year came from loans in their name, parent plus loans). We agreed that I should leave that box unchecked (claim as independent) since it will help me more than it helps them if they claim me as a dependent. However, before I file I just wanted to make sure if this is O.K.

If it isn't and I check the box, and I don't get claimed by my parents will the IRS reject my parents filing or is everything good?