Long story short, it has just come to light that I have been underpaid significantly since submitting DS (going into 2nd year) and DD's (starting next month) student maintenance loan income evidence so should have declared more than I did. How will this affect things and how do I submit revised info? Will DS have to repay what's presumably been overpaid for last year? I've tried online and phoning (on hold 30 mins so far)...any experts out there please?