Work for the US in Canada

[idtknow]

A small business in the US would like to give me a project to work on. I don't need to go to the US and just need to work remotely in Canada. I don't have a registered company. Is this legal? Do I need any work permit or visa for the US part? (I am immigrant in Canada).

Any one has the similar situation?

Thanks.

 

[月下独酌]

legal as long as u pay canadian tax