Since you are a service member and the dependent child is under 18 the it would cost you nothing.
How can my dependent child still receive dependent coverage after age 18?
Is your child a full-time student?
Yes, my child over 18 is a full time student.
How can a service member login?
The service member can log in with their CAC or DS logon using inernet explorer or as soon as they receive notice that they can start using SOES.
How can I tell you about the death of a covered family member covered by the policy?
A service member would need to file a Report of Death of Family Member SGLV 8700 and you can download online.
How can I receive an insurance payment in my time of need?
A service member would file a Claim for Family Coverage Death Benefits SGLV 8283A and download it online.
How much will a service member pay for spousal coverage and how do the premium payments work?