Total refund amount doesnt increase at all for my spouse when i select simple method under work from home expenses claim ($400). please suggest.

[TurboTaxSusan]

Employment expenses are a deduction from your income, not a credit. It helps to lower your net income, and therefore your taxable income. Depending on your situation, this may or may not affect your refund. But you will not get anything directly added to your refund.

You can see how much of the deduction you are getting by looking at line 22900 Other employment expenses on your detailed tax summary. 

This FAQ shows you how to get to the Detailed Summary in TurboTax Online: https://turbotax.community.intuit.ca/community/tax-return-status/help/how-can-i-see-a-detailed-summa...