1099 LTC Forms. Use the 1099 LTC Copy C to print and mail payment information to the Insured. Forms are 3-up on an 8 ½” x 11” sheet with a ½” side perforation and are printed with required red scannable ink on 20# laser paper. Order the quantity of 1099 LTC Forms equal to the number of employees for which you need to file. Mail in 1099 form in 1099 envelope #99DWENV05 or #99SWENV05 .