If you make a capital gain from the sale of shares by the November 30 deadline, then you are obliged to make a CGT return to revenue by December 15. However what happens if you sell shares in December at a loss which wipes out the gain you made earlier in the year. Do you still need to make the CGT return to revenue or can you use the capital loss from the December sale to wipe out the earlier gain. I have not seen this explained anywhere before. Would appreciate any input.