here are the requirements for EIC in 2018
https://ttlc.intuit.com/questions/1899157-what-are-the-qualifications-for-the-earned-income-credit-e...
why do you think hobby income is not count towards the credit?
you didn't mention his age or whether there are dependent children, so please read this part carefully (it's in the link) . Is this the issue?
if you're not claiming a qualifying child:
- You (or your jointly filing spouse) must have been born on or after January 1, 1954; and
- You (or your jointly filing spouse) must have been born on or before December 31, 1993; and
- You (and your jointly filing spouse) cannot be claimed as a qualifying child or dependent on anyone else's return.
