Received Two SSA1099. Do I enter Both on My return? My dependent son has a Large back payment, and he had little income in 18. he is 17,and I don't want his return Bad.

My son is 17, and only worked for Five months, I just need to know if I can add both, and enter on mine. He has student tuition credit with his Social Number, guessing tat needs to be on his retur also, Thanks in Advance...