Part of my ROTC scholarship in 2016 was a retroactive reimbursement for fall semester 2015, so the 1098-T scholarship is greater than the 2016 tuition costs.

[Hal_Al]

Ignore it. You do not need to count that as income, for two reasons. ROTC scholarships are specifically exempted from taxation  in the tax code.  A retroactive scholarship payment for a previous year is also exempt. That assume that you, or your parents, did not claim a tuition credit, on your 2015 return, based on what you paid in 2015 and were later reimbursed for.