1. Firstly the decree of divorce passed by the foreign court is not valid in India unless validated by the Indian District Court. However, you can file a divorce suit in India and pray for a direction upon the I.Tax authority to certify about the authenticity of the said I.Tax statement.
2. I.Tax department will not entertain you for certifying the genuineness of thebsaid statement, without Court order.
3. She is still your spouse and not ex-spouse. After getting the decree of divorce from the Court of Canada on mutual consent, both ofn you shall have to file a petition before the District Court in India for getting the foreign decree validated.Otherwise you both will be continued to be considered as legally married couple in India.