I am 70 Aug, 2021 and I am still working. The CRA web site says CPP stop automatically at age 70 with no specifics on if it goes by birth date or just the year when one reach 70. If I want to max out my CPP payment, do I stop my CPP contribution in Aug and apply for CPP payment starting September ? or I should just stop my CPP contribution in 2021 (*i.e. he year I reach 70) and apply for payment starting September ?