You should file an amendment (Form 1040x) ASAP.u00a0 Also, depending on where you live and what was filed, you may also need to file an amended state return.u00a0 Since the tax preparer screwed up, they have an obligation to file these forms for you free.u00a0 Even so, I would seriously consider firing your current preparer and paying to have the amendment filed by someone more reliable.As for doing it yourself with Turbotax or some other program, it's probably a poor idea.u00a0 If you are an independent contractor, you will need to file Schedule C with your return.u00a0 Schedule C can be fairly complex, and many filers should also be using forms like 8829 or 4562, which are even more alien to the untrained.u00a0 It's worth paying to find somebody who knows their way around it.