^ Actually, if the operation’s done now, it won’t appear on the 2016 income nor on the 2018 bank statement. Typically colleges only want the tax returns and a bank statement from a bank official about how much is available.
Keep in mind Op is an international student. It is not a matter of showing up as income. Since most schools are not need blind to international students. Her parents providing bank statements will be part of her financial aid process (and ability to pay). The school can go back as far as they want when it comes to their money