You'll need to complete Schedule C or C-EZ. I hope you kept a record of all the miles you drove because it's usually more advantageous to just take the standard mileage deduction than keeping track of car expenses (intenance, auto insurance, etc.). You can also deduct any fees, etc required to drive for them. You'll need to pay self employment tax (FICA & Medicare) unless your net profit is less than $400. Schedule C can be a little difficult so you may need some help. Good luck.