You need to make sure you are entering losses as "Net Capital Losses". Under Deductions & Credits, you should have a Loss Profile section where you can enter the amount from your NOA. Even if you have carried forward your information in TurboTax, you'll still need to "apply" these losses to your current year tax return.
The amount of your Taxable Capital Gains will show on Line 127, then the amount of Net Capital Losses will be deducted on Line 253 to reduce your taxable income on Line 260.
If you are still experiencing issues with your losses applying correctly, you may want to contact our Customer Support team. https://turbotax.community.intuit.ca/replies/3152013