You will need to manually complete for T1135 for the years in question and provide this information to CRA by separate mail declaring that you are providing a late filed T1135 under the Voluntary Disclosure Program.
Access the PDF form here;
https://www.canada.ca/en/revenue-agency/services/forms-publications/forms/t1135.html
General information on the Voluntary Disclosure Program;
https://www.canada.ca/en/revenue-agency/programs/about-canada-revenue-agency-cra/voluntary-disclosures-program-overview.html