If i applied for the scholarship last year, do i need to reapply this year again?
According to this, no. If you scroll towards the bottom of the page, under “How to apply” it says you do not have to apply again.
https://www.hesc.ny.gov/pay-for-college/financial-aid/types-of-financial-aid/nys-grants-scholarships-awards/the-excelsior-scholarship.html