CRA Error Code 94 indicates a mismatch between the tax return information and CRA records regarding the taxpayer's name, Social Insurance Number (SIN), or filing status (e.g., falsely indicating a first-time filer). To fix this, verify the SIN, first/last name, and DOB match CRA records exactly, update name changes, or correct the first-time filer status. If you are using NAC (Netfile Access Code), you can also try removing it, as it is not mandatory.

• Double-check the Social Insurance Number (SIN), first name, and last name on your tax software's personal information page against your official documents.
• If the name does not match CRA records, you may need to update your info with the CRA, or if it is a recent name change, ensure the proper "name change" indicator is selected in your tax software.
• If the error states you are not a first-time filer but you marked that you are, change this setting in your tax software.
• Ensure your tax software is updated, save the return, and attempt to re-file.
• If the information appears correct but is still rejected, call the Canada Revenue Agency to confirm the name and SIN they have on file.

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