https://turbotax.community.intuit.ca/community/seniors-students/discussion/re-i-dont-know-my-widows-social-insurance-number/01/3904660#M17489 I'm sorry to hear of your loss.<BR /><BR />If you have previous tax from when you were together, their SIN should be on those. You may also be able to find it on other documents, like a mortgage or joint bank account application. Wed, 22 Apr 2026 00:57:27 GMT TurboTax_Susan 2026-04-22T00:57:27Z https://turbotax.community.intuit.ca/community/seniors-students/discussion/i-dont-know-my-widows-social-insurance-number/01/3904251#M17483 my ex passed away . need to get his social insurance number Tue, 21 Apr 2026 14:23:26 GMT https://turbotax.community.intuit.ca/community/seniors-students/discussion/i-dont-know-my-widows-social-insurance-number/01/3904251#M17483 gwendolyn4121 2026-04-21T14:23:26Z https://turbotax.community.intuit.ca/community/seniors-students/discussion/re-i-dont-know-my-widows-social-insurance-number/01/3904660#M17489 I'm sorry to hear of your loss.<BR /><BR />If you have previous tax from when you were together, their SIN should be on those. You may also be able to find it on other documents, like a mortgage or joint bank account application. Wed, 22 Apr 2026 00:57:27 GMT https://turbotax.community.intuit.ca/community/seniors-students/discussion/re-i-dont-know-my-widows-social-insurance-number/01/3904660#M17489 TurboTax_Susan 2026-04-22T00:57:27Z