So you filled out schedule C in the past? This is just more income on your sch C. Nothing special about it. You might get a 1099Misc if they pay you $600 or more for the year. Did they have you fill out a W9 form when you started? Do you have a EIN number or just use your ssn?
They aren't taking taxes out of your payments, right? You're not going to get a W2 for it.
