Can we use the grocery bills from a northern store (remote community in norther Ontario) for tax deduction. Could you please advise where do I enter that?

[TurboTaxKim]

You aren't able to claim your actual expenses (such as groceries, fuel, etc) when you live in a remote community, but if you live in what CRA considers a "prescribed zone", you can claim the Northern Residents Deduction. These deductions provide relief to those who live in a prescribed zone and recognize that such individuals are often faced with a higher cost of living, environmental hardships, and limited access to services. 

The deduction itself lowers your taxable income and more information on qualifications and how to claim in TurboTax can be found here:

https://turbotax.community.intuit.ca/replies/3307352