YSK, if you live in the US, that tomorrow, Friday Dec. 15, is the last day to enroll in a 2018 health insurance plan through the federal government's insurance exchange, HealthCare.gov.

For most people, this is the last opportunity to secure coverage for 2018, or switch from an existing plan. Those who fail to sign up on time could face a penalty and have to wait until next year to obtain coverage. If you have questions, call 1-800-318-2596 to speak with a trained representative 24 hours a day, 7 days a week.