If you have a T5008 slip, you can just enter the slip. If you don’t have a slip, you can enter your losses in the capital gains section.

I got there but it's confusing since I don't have a slip.  Is it true you can off set 3K against your regular income??
I had stocks trades sold with a loss of over 20K last year what do I do can I claim this for the next few years on my taxes, I don't have any gains just regular work income.

The 3k rule is for the US, not Canada. In Canada capital losses cab only be used against capital gains. But if you don't use them, they carry forward for the rest of your life. If you still have losses when you pass away, then they can be used to offset other types of income.

Oh no, only in US :(  Okay thank you for you help