It depends whether the insurance coverage you had met Minimum Creditable Coverage (MCC) requirements. Your 1099-HC and 1095-B plans will indicate whether your insurance met MCC requirements.
MassHealth automatically meet MCC.
If the Massachusetts Health Connector insurance was a Qualified Health Plan. then it, too would automatically qualify.
No further forms would be necessary after identifying these two plans for your coverage.
Click the link for the Instructions to the 2019 Massachusetts Schedule HC Health Care for the specific qualifications for MCC.
Click on 2019 to open the PDFs for other Massachusetts Health Care information.
You would need Schedule HC-CS Health Care Information Continuation Sheet if you had more than the two already mentioned.