<human>: Can you provide a brief overview of the text?

I moved to Japan to work in August 2015. When I filed my 2015 IRS tax return (a joint return with my spouse), I claimed $3,359 for the EITC, based on salary income I earned in Japan from August to December, and on my child's status as a qualifying child. The IRS adjusted this to $0, giving only the sentence "Information on your tax return indicates that you don't qualify for this credit" as explanation. I am at a loss as to what this "information" could be.

I claimed and was granted the EITC for years 2012-2014. The only significant differences I can see in my 2015 return are a change to an overseas address and that my income was earned overseas rather than in the U.S. The IRSs "EITC Assistant" tool tells me I'm eligible to claim $3,359.

Additional Information:

I did not file 2555 or 2555-EZ, nor was I eligible to.

Both spouse and I are US citizens.

Child lived with us in U.S. for more than half of 2015.

No investment income.

Not in the military.

As far as I can tell, salary earned in a foreign country is "earned income." What am I missing here?
<bot>: In the past several years I have taken the EITC. I moved to Japan in the second half of 2015 and earned income there. I claimed the EITC, but this was adjusted to 0. Any likely reasons why?