Yes. If the T5008 is reporting capital gains/losses then those amounts should go on S3 Schedule 3 - Capital Gains (or Losses).
If the T5008 is for Investment Income, you may need to go back and change the the type of income selected. To do this in TurboTax Online, use the Find tool (magnifying glass) to search for "T5008". Then select T5008 - Securities Transactions from the list, and then click the Go button.
