You can only make changes if have qualified event like marriage or birth of a baby
You must make changes within 31 days of the event
If you add dependents to your coverage, you must provide documentation to verify their eligibility. Documents that support your changes, such as a birth certificate or marriage license, should be given to your HR Manager or Office Manager. Otherwise, your dependents won't have coverage.
Your HR Manager or Office Manager can provide you with a 2018 Benefits Enrollment Change Form. Be sure to complete and submit the form within 31 days of your qualified life event.