I am self-employed and over 65. I elected to stop contributing to CPP as I have already maxed out my possible benefit levels.  The model continues to deduct CPP as part of its taxes calculation.  How can I override this?

Yes. The TIME MACHINE assumed you would always contribute.  You can now change that under the CPP/QPP and OAS tab, set the age at which you will stop contributions.

Thanks for that suggestion.