Multiple tuitions for 1 account

We have a class tuition account that we charge our competitive students for their technique classes from September-May but we also have a competitive fees account that we charge our students for their competitive fees that is separate from their tuition account that is charged from June-March. If we could have the option to have 2 accounts for 1 student that would be great! We can't combine the accounts because one starts in the summer and ends mid year and the other starts in the fall and ends at the end of the season.