I found reference online in a Toronto Start article
https://www.thestar.com/news/queenspark/2018/03/28/highlights-from-the-2018-ontario-budget.html
That was the *proposed* budget. The $750 for seniors maintenance cost didn’t make it into the bill that actually passed. https://www.taxtips.ca/ontax/ontario-budget-2018.htm
You can see what tax credits, benefits and government pensions available for seniors in Ontario here: https://www.ontario.ca/page/seniors-manage-your-finances
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