Made a mistake on student finance application

I was confused as to why it was asking for evidence of student status.
I didn’t realise at one point I suggested that my partner was a student - the line i selected was ‘you or partner who’s a student, will be financially responsible for an under 20 year old in full time education’ - to me the key word ‘OR’ meant that either myself or my partner was the student and now I can’t change it and it’s asking me to prove him studying when he doesn’t. What can I do?

Hi there, you can upload a cover letter to your account advising you made an error and they are not a student. This will go to be rectified and update on your behalf. Thanks, Jason

Hi, Thankyou, may I ask how I add this to the application? Is it when submitting evidence?

Yes, it is. Thanks, Jason

Hi again, I still cannot find where I can put a letter on, the only bit I see is the upload evidence (under proof part) but can only upload a photo. Can you direct me further or show a photo of what it looks like?
Thank you