I am preparing my son's and his wife's taxes. She was a student the first half of 2018. The 1098-T she received has an amount in Box 6 only. What do I need to do?

When I entered this into Turbo Tax it has no impact on their refund amount.  I researching this I keep coming up with needing to prepare an amended return for the previous year.  However, Turbo Tax does not say anything about needing to file an amended return.