Why is the refund cheque I received less than it should be?

[endomondo]

The refund on the website is indicated as $545.66 but cheque I received was around $470.

[TurboTaxBrenda1]

You will need to look at your Notice of Assessment and it will tell you why the difference. 

Before submitting a claim, refer to the conditions and exclusions provided to verify you are eligible. Once confirmed, follow the steps provided to prepare and submit your claim:

How do I submit a claim under the TurboTax 100% Accurate Calculations Guarantee?

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