Nah, you just pay tailscale through their site for mullvad access. So you can't connect to an existing Mullbad account. In either case it does compromise your privacy, as you're associating an identifiable Tailscale account with VPN activity. 

chairman_pretense

How does it actually work? Like do they ask you to fill in account number in the Tailscale app?

nout

tech

Tailscale Has Partnered with Mullvad

Cool integration, but annoying it doesn't work with an existing paid up Mullvad account. Makes sense for Tailscale to monetise as a reseller I suppose. 