Please see this answer from VictoriaD75.
Only the 1095-A needs to be entered on your return from insurance purchased through the marketplace. If you received a different 1095 form, such as one from employer benefits, you do not need to enter anything on your return. It is for your records only.
The 1095-HC is only sent for plans in MassHealth. If he was covered through your employer, he will not receive 1095-HC. He just needs to indicate that he had minimum essential coverage on his Massachusetts return.