Form CPT30 Election to Stop Contributing to the Canada Pension Plan, or Revocation of a Prior Electi... is a form that you fill in and give to your employer if you want to stop contributing to CPP after age 65.

I don't have  a employer to submit a cpt30 form too I am retired 

@robert koebel If you are not employed, then you don't need the CPT30 form as you don't make CPP contributions on employment income.