> I've always wondered how that worked, because in Switzerland you are taxed based on the area you live

are you sure it's based on where you live and not where your finances live ? ('residance fiscale')

here a website that tells you where you have to file taxes depdending on where your work in Switzerland: [guides/fiscalite-frontaliers](https://www.allo-declaration.com/guides/fiscalite-frontalier...)