CSS Profile messed up my financial aid

It seems right now that we just have no way to prove that my stepdads interest income through the company can’t be used for college. He called it “working capital”, and that it was used exclusively for the business’s expenditures, meaning it doesn’t belong to him even though he is the CFO.

How in the world do we prove this? The counselor at USC claimed that a cpa letter needed to be backed up by documents, but I have no idea what kind of documents would support that.

Also, we have a huge income loss through our company that practically nullifies my step-fathers adjusted gross income. They are counting it as a paper loss, although it pretty much makes my mother’s income the only source of income. Once again, what documents would prove that the company loss is a real loss and not just a paper loss (cpa letter is not enough again).