I had the same problem, and needed to delete the existing file and create a new one, and then it worked. On the original file, going back to the interview questions and clicking "Yes" for "Did you want to stop contributing to the CPP on the self-employment income?" did not change anything, and the results still showed the CPP deduction. I found that I needed to delete the file, then create a brand new file, and make sure I answered the question for CPP as above. Then, no CPP deduction was made on the new file. Hope that helps.