I'm 68 years old. I didn't receive any CPP distribution in past 3 years, and have self-employment income. I chose to stop paying CPP by selecting yes to "Did the taxpayer want to stop contributing to the CPP on the self-employment income", and specifying the correct starting date 01-01-2016 in the next field under the "Canadian Pension Plan" section in "Controls" tab. However, I'm still paying the full CPP in schedule 8 in the final return. Warning shows the date is not correct, so it ignored. I have tried this in different ways for three years already, but no luck. Could anyone help me troubleshoot why I cannot elect to stop paying CPP in UFile?