TurboTax estimated a refund amount, but after I filed the CRA said my refund was Nil. Not sure what I've done wrong, what should/can I do?

[TurboTaxBrenda1]

You will need to wait for your Notice of Assessment and review it to see why it would say NIL. 

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

Thank you for choosing TurboTax.