Hi there, I'm not fully understanding this part of the Swiss tax system, perhaps some of you do better than I. One question, that I thought should be obvious to find a clear answer to but failed:

Let's assume I hold a GmbH and am it's own employee, the GmbH has it's "Rechtssitz" in canton A (via a Domizilhalterin), but I live in and am registered in canton B. I do not have another job except being the holder and employee from the GmbH. Will my personal income (my salary) be taxed according to canton A or B? For simplicity, let's assume the GmbH does not make any profits after salary, not sure this would matter though.

If you can back it up by any document / clause that I might have overseen, that would be perfect.
Thanks!

Edit: I thought the answer was "B" (where I live), but this source might suggest otherwise: https://www.vermoegenszentrum.ch/wissen/wo-ist-man-steuerpflichtig
Something more official would be helpful.