Should we have a federal 1099 form or Schedule K-1 (Form 1065) if the income was from making a sculpture for a private order? The customer paid 10000.

Hello! We recieved a notice from IRS, they require some documents. They say to send them any federal form 1099 or federal Schedule K-1(Form 1065), Partner's Share of Income, Deductions, Credits. Do I understand correctly that we do not have anything from that and should not have? The only income was because my father in law made a sculpture for the private order from an individual that wanted this sculpture for himself.