If you have registered with the docsing.ca website, you can track all the returns you have filed by enabling the 'Enable filing report to docsign.ca, you can easily search filing records later." option in the DocSign.ca Preference window. You can check out Set up docsign.ca preference in software page on how to set up.
After logged-in on your Dashboard, click the 'Tax Filings' icon in Tools & Services section to access all your filing records.
The following screenshot shows how the Filing Report will look like on the Dashboard. You can also filter the filing records with taxpayer names, S.I.N, and filing dates, etc,. You can track status, confirmation code and messages returned from CRA if a filing is failed.