To troubleshoot this, I recommend double-checking all the dependant's ID fields, even the optional ones, to ensure there are no typos or missing information. If everything looks correct and you're still encountering the issue, it might be worth reaching out to the Netfile support team for assistance. They can provide more specific guidance on resolving this problem and ensure you can file your taxes on time.Also, you can check out idanalyzer. They offer solutions related to identity verification and scanning, which might be useful in ensuring the accuracy of your dependant's ID information.
