"Are you saying that the 2$ per day is only for Canadians?"

That form and that provision are available in Canada. I've never seen "$2 per day" in the US, and if you put "2$" that seems Foreign to me.

Read this:

https://turbotax.intuit.ca/tips/do-you-know-you-can-claim-400-in-expenses-if-you-worked-from-home-du...

How can you not know which Country this is for?