Am I supposed to file my teenager taxes?

My teenager made roughly $1400 in wages (received W-2) from life guarding, and also received $7400 in unemployment (received 1099-G) due to the pandemic.  I'm trying to first figure out if he needs to file?  Turbo tax shows if they made less than $12400 in earned income they don't need to file, however it does say if they made more than $1200 in unearned income they do file.  I'm not sure what category unemployment falls into?   Also I'm trying to make heads or tails if I do need to file, should it be under my return or his own?  Note I do claim as a dependent.