Do I select yes for the 2023 Ontario Trillium Benefit if my partner already claimed it?

Hi @robin-skinner ,

Thanks for reaching out!

If one spouse or partner has applied for the Ontario senior homeowners’ property tax grant, only that person can apply for the Ontario energy and property tax credit and the Northern Ontario energy credit for the family.

Please refer to https://www.canada.ca/en/revenue-agency/services/child-family-benefits/provincial-territorial-programs/ontario-trillium-benefit-questions-answers.html