Does a 1099-Q for an eligible 529 distribution get recorded on my 1040 or my son's 1040?

We took a distribution from a state-sponsored 529 plan toward eligible expenses for my dependent’s college education. After entering the 1099-Q data on my return, I receive a message that “Based on the educational expenses you’ve entered, the student beneficiary must report $356 of taxable income from this distribution.” When we complete my son’s return, the message is that he should not claim it but I should. 

 

You can see why I am confused!  Which is it, please?

 

Notes:

1. My 21-year old son is a dependent, working toward his first bachelor's degree.

2. The expenses were eligible and there was no refund.

3. His AGI is $2,400.

 

PS: I acknowledge that it isn't "necessary" to include this because the expenses in this case were eligible but I want to understand the "right" way.