filing status of 18 year old with significant earned income

[Bob N 34]

Can a 18 year old High School student who provided more than half of their support with earned income file their taxes independently if their parents do not claim them

[MinhT1]

Yes. If you provided more than half of your own support, then your parents cannot claim you as a dependent. You can file as a non-dependent.

[NCperson]

but be careful how you determine 'support' ; this is the official IRS worksheet. suggest using it to determine that in fact a high school student is supporting more than 50% of his own support as it is quite unusual.

https://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf