I had medical expenses started in Nov 7 2016 and completion and payment was Jan 26 2017 what dates do I enter for claiming this medical expense.

Medical Expenses can be claimed for any 12 month period ending in the tax year. As a result, you can claim the full costs for these expenses on your 2017 tax return. On your 2018 return, you would start your medical expenses claim starting from Nov 7, 2017. 

Best,

Julie