Do I need to mail in my first tax return?

[vinnynykipilo]

I am filing for the first time.  Error message says "The information sent to the CRA doesn't match the information on record."  How do I find out what doesn't match?

[TurboTaxSusan]

You can’t use NETFILE to file your tax return if you are filing an income tax and benefit return for the first time with the CRA and the CRA does not have your complete date of birth on record. So most people filing for the first time do have to mail in their returns.