Are there a lot of choices for ‘race’ on the current form? Do any of them fit you?
For ethnicity, are there more choices than “Hispanic? Yes/No, and if Yes, white or non-white?”
You can check whatever you identify with. It won’t matter on for college admission, but will be what the college reports to the federal government. Statistics.
You can report what you like on the census, or your parents can if you live with them and they fill out the form. Everyone in a family can have a different race and ethnicity if they identify differently. Many people will have different answers for 2020 than they had in 2010 - address, marital status, even sex. The individual answers are not compared to prior filings.