I mistakenly declared myself as a dependent, does this need to be amended? Am i missing out on a larger return by my dependent status?

I am 24 years old this year. Every previous year my parents have claimed me as a dependent. I completed my taxes early and submitted them before my parents so i marked myself as a dependent as i have always done in the past. However when my parents began their taxes they realized that i no longer qualified as their dependent. So i should have marked independent but by that time it was too late. Do i need to amend this? Would the amount of money i got back be different depending on my status as one or the other?