Are you using TurboTax Desktop? No issue with CPP were reported at this moment.
If you are using TurboTax Desktop, make sure, in form mode, that the province of employment is identified in your T4 (box 10). Compare the amount of your CPP contribution (box 16) in your T4 with the amount on line 44800. If it's a different amount, you can have a look at Schedule 8 and see the calculation done by the software (see screenshots).
To help you understand the CPP calculation, please visit this link.
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