When I go to file my clients 2017 return I get the error code of 92124 : Your client is no longer entitled to claim the Canada Pension Plan overpayment because the filing date of this return is more than four years after the end of the tax year.

I overrode all of the S8 overpayment forms, as well as line 308 and line 5034 and it still won't let me file his return.