We answered you in another thread, but here is the answer:

On your T4 slip, you entered CPP contributions in boxes 16 or 16A, but you should have an amount of pensionable earnings in box 26. This box is required.

If box 26 on your T4 has zero ($0) in it, you don't have to do any changes, just enter zero ($0) as required. If box 26 is blank, enter the amount from your box 14 (up to a max of $73,200).

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