I am filing my wife and my taxes jointly on turbotax. I filled in my wife's T4 info including $3052 in CPP deductions. In the tax summary it doesn't show a CPP deduction it shows a CPP overpayment of $3052. My wife retired a couple of years ago and receives a pension but she went back to work and paid CPP. My concern is that we will owe more in tax if this overpayment is reversed and/or also that if her CPP contributions aren't valid then it will reduce her CPP when she does retire. Why did this happen
