I would guess - yes.
I don't download anything from Canadian revenue and I am doing it for myself manually.
The reason that I think you can amend everything whatever you want is that I download it for my spouse, who has a regular employment and obviously different situation. . However, every single year T4 is fine and Relelve 1 has many mistakes. I keep T4 and I amend Releve 1.
I expect tat you can do the same with T5008. Keep the data that is fine and delete all that is wrong. You can also delete some of T5008. In my case, I had so many of these forms ..., I mean maybe about 100 that it didn't make to sense to use it. I just created 2 separate entries of T5008, one for transactions in CAD and another in USD. Well, and one more for a different brooker.
