If you have Capital Losses from previous years, you will need to enter the verified amount and they will be applied against any taxable Capital Gains you have incurred this year. You will still see your Capital Gains added as income on Line 12700, then the Capital Losses further down on your return as a deduction on Line 25300.

Here's some more information from TurboTax on deducting losses: How do I deduct losses?