Would it have made a difference in my refund? Do I need to submit a correction when I file for 2016?
https://www.irs.gov/pub/irs-pdf/f1040sei.pdf
Look at the form ... was 4A marked no and 4B marked yes? If so lines 5 & 6 should be filled in and you would have gotten the EIC on the form 1040.
A "Yes" on line 4A would get you the same results.