To enroll in a Marketplace health insurance plan, you will need to provide certain information about yourself. It can be helpful to have identification documents, income-related documents, and, if applicable, immigration documents with you at your appointment so that you have all the information you need to fill out your application. In addition, the Marketplace sometimes asks that you submit certain documents to verify the information that you provided on your application. Having the necessary documents at your appointment can make the process go more smoothly. Before your appointment, don't hesitate to ask us about what types of documents you may need to bring. You can also check out this extensive list on HealthCare.gov which tells you the documents you may need to submit to verify different types of information.