Tax for shares, page-15

@ddzx
Hi I have a question

If I was to sell all my stocks with a profit of $1000 and a loss for $600, making my net $400. Can the $400 be taxable instead of the $1000 since i incurred a loss and was sold on the same day? Or is it still $1000 and the $600 will be deducted from my profit for the next financial year?

Edit:
Oh and another Question. What happens if I am both an investor and trader. I sold some of my stocks before 12 months but i wish to sell some after 12 months.