Where can I see break-down of total federal and Ontario non-refundable tax credits?

Question

Please see my 63 y.o. Ontarian dad's cash flow.. I screen-shot, but rounded the values from his 2018 Notice of Assessment.

1. Where can I see tax credits broken down? I want see them so that I can resubmit TD1

   form to his employer so that less income tax is deducted from his paycheque.¹

   Notice of Assessment beneath doesn't itemize tax credits refunded him.

   

2. Reddit recommended https://sherpa.tax/dashboard?pg=1, but it looks wrong? Dad clearly was refunded $5000 tax credits, more than $227.42

   

¹Gill, Madura. Personal Finance, 4th Canadian Edition 2019. p. 129. Last paragraph.