I suggest that you deleted the dependent and re-enter.
You must have answered one or more questions incorrectly. A nephew is not "your child" he is an "other" dependent, not eligible for EIC. If he is over the age of 18 (or over age 23 if a full-time student) and earned more the $4,300 then he cannot be a dependent at all and should not be on your tax return.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
