Home business expenses, cannot see where i report the % of sq ft for the business against total sq ft of dwelling???

[TurboTaxSusan]

If you are using TurboTax Online (but not the Self-Employed version), then you can find the boxes for total area/rooms in the home & Area/number of rooms of the workspace just under the title “Calculation of business-use-of-home expenses” on the T2125 - Business Statement page.