Tricare help!

Katie

Sort of long story but stick with me!

I just turned 21 and in a full time college student. I renewed my id and it expires in May because my paper from my school said I graduate in May, which I don't. So I found another paper from the school saying I'm full time but has no expected graduation date. Can I use that? I can't find anything online saying it has to have a graduation date on it. I'm trying to get the school to change the date but sometimes they're impossible.