Hi,
Yes, the auto-filled ones must all be deleted otherwise you will have duplicates in the tax return. I think there is also a limit to how many T5008 can be entered, and the limit is much lower than 1,000.
On my return I only have two items and I have given them names "CAD trades" and "USD trades in CAD", each with their CAD dollar values, for my CAD and USD trading totals.
If CRA requests more information on those totals then my response would be to provide my Excel sheet showing how the totals were calculated, and the T5008 statement from the broker or bank.
Making a recommendation on whether you should pick Investment Income or Capital Gain is only something a tax professional should really do, but usually if someone's salary is their main income and they are not an investment professional (have formal training and have financial certifications) then their investing hobby is capital gains.
Andy
