I sold my house earlier this year and am exempt from paying CGT because it was my principal primary residence. I understand that normally CGT would have to be paid by mid December and that it would be done so online, first I would need to register for CGT. However, as I don't need to pay anything due to the exemption, do I still need to register online? Or do I just wait until next year and file a return before October 31st? Thanks for any help!