There is no specific IRS Form 720c. The Internal Revenue Service (IRS) Form 720 is used to report and pay the excise taxes imposed on the sale or use of certain products and services. However, Form 720c does not exist as of the current information available. It is possible that you may be referring to a different form or a specific section within Form 720. If you can provide more context or clarify your question, I would be happy to assist you further.