Once your personal income tax return has been filed, your return is uploaded to the Canada Revenue Agency(CRA) through NETFILE, as you will receive a confirmation number which is your proof that your tax return was filed and received by the CRA.
This confirmation number is important for two reasons, the first being, that you know your return was submitted and received by the CRA, and secondly, if there are ever any questions from the CRA around the filing of your return, like the date it was filed, you have the proof.
You will successfully NETFILE your tax return when you receive a confirmation number at the end of the process. If you do not receive a confirmation number, your tax return has not been transmitted to the CRA through NETFILE.
For more information please refer to the following TurboTax article:
NETFILE is Open: Learn How To Use NETFILE for your 2021 Tax Return
How do I know if my return was filed using NETFILE and received by the CRA?
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