If you have insufficient capital gains in the current tax year and still have an amount left over, you can claim net capital loss. Net capital losses can be used to lower your capital gains in any of the three preceding tax years or future tax year.

Please read this great TurboTax article: Carrying Capital Losses Backward or Forward & Claiming Capital Gains and Losses

Yes, you can have your list of summary- however you still need a T3 slip, if you weren't provided with a T5008 slip. Please read the following from the Canada Revenue Agency: Capital gains and losses Summary.

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