You may qualify for a special enrollment period (SEP) if you gained a dependent through birth of a child.
Be prepared to send a copy of the birth certificate. The birth certificate must show:
How and when do I send documents?
During the SEP application process you'll be instructed on how to send verifying documents, if they are needed. MNsure must receive your documents and have enough time to process them for you to have time to select a plan before your 60-day SEP window expires.