<prompt> Human: If I use an online service like Turbotax to file, is it possible to send along an additional form to the IRS on its own, or would that cause issues? Basically I need to submit a Schedule C to report some small freelance earnings, but it looks like most of the software options make you pay for their premium product for access to that form, since its typically for larger businesses and more complicated situations. Any suggestions?  <response>: No, you cant efile an incomplete return. If you want to avoid paying you could just do your taxes on the forms the IRS provides for free and send your whole return in by mail. Or efile using 