Yes, you'll need to prepare an amended return to include the Schedule C. You will also need to write a letter explaining the personal monies that are included in the 1099K. I believe the CP2000 letter you received has instructions on the backside of one of the pages that explains how to send a 1040X along with the CP2000 response.. You'll write CP2000 across the top of the 1040X return and send it along with the explanation letter and the response page of the CP2000 to the address shown in the CP2000 notice.
♪♫•*¨*•.¸¸♥Lisa♥ ¸¸.•*¨*•♫♪
