I filled my 2008 tax return using TurboTax, and was mis-advised regarding the Earned Income Tax Credit. Turns out I was eligible, but had not filed as such. Can I re-file? How do I go about doing so? I don't owe, but my return for 2008 was horrendously low. In comparing with my peers, I found out I had indeed been eligible. Is there any way for me to cash in on this missed opportunity at a later date?