You may want to verify the CRA site and read what you are suppose to do with trades done in USD
I believe you need to use the "settlement date" ( T+1 ) for conversion to CAD dollars, when you buy and when you sell ( which is always different as the exchange rate is changing every day )
I don't think T 5008 show settlement dates, so how can Turbotax do this, I do not think they can, you need to do your own calculations with the settlement dates ( Buy and sell ) for each security
