You will need to contact the CRA at 613-940-8495 they can assist you.
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You can log into your CRA My Account to see if it was received and if not follow the steps below on how to NetFile your tax return:
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I did file my tax in april but i never received any tax refund or gst or carbon tax refund
@dengaets If you used NETFILE to file your return and didn’t get confirmation number, then your return was not successfully filed. Please try again. Follow these instructions for TurboTax Online or TurboTax Desktop.