How did you later complete this form a and how did you go with the payment?

Iamgrac:
Good evening everyone,

Please I'm in need of your help
I'm trying to fill form a for my payment of tution fee to centennial college I've gotten to the stage of attaching documents in the first slot I already attached my acceptance letter but I don't know what to attach in the second slot. I can't continue without attaching a document to it because it's mandatory.
Please view the below screenshot to have a better understanding of my question