I earned $600.00 at a summer football, why is entered as a business? i was an employee/coach

[re2boys]

If you were an employee, you should have received a W2.

If you received a 1099MISC, your organization considered you an independent contractor providing coaching service, thus a self-employed person that reports income and expenses on Schedule C as sole proprietor.

You can take legitimate expenses such as mileage to out of town games, cost of any clinics or certification credentials, coaching supplies (clip board, whistle, stop watch, etc) ordinary and necessary in performing you duties as a coach.