Contributions of Motor Vehicles, Boats, and Airplanes. Use Form 1098-C Copy A to print and mail payment information to the IRS. 1098-C forms are printed in a 1-up format, on 8 1/2" x 11" paper with 1/2" side perforation, and are printed on 20# laser paper. Mail as a batch to the IRS. Order by number of sheets.