We both agree the NDAs were not campaign contributions.
Cohen did not pay the NDAs with campaign money.
Trump did not pay Cohen with campaign money.
So what FEC paperwork is required again?
He paid it with his money, but was reimbursed with campaign money because explicitly billed it as a campaign expense.
"Trump did not pay Cohen with campaign money."
He did - it becomes campaign money when you pay a campaign expense.
"So what FEC paperwork is required again?"
Any payment over $200 requires disclosure. It wasn't disclosed and that is one of the crimes Cohen is going to jail for.