Yeah, I know what you mean. Also, even though my partner has a Dutch tax ID, we still can't file together ourselves, on account of her not having a Dutch ID, an

Yeah, I know what you mean. Also, even though my partner has a Dutch tax ID, we still can't file together ourselves, on account of her not having a Dutch ID, and therefore not being able to setup DigiD 'correctly'. We can have a tax consultant do it for us however! Highly optimized for the happy path, which of course does cover 99% of cases, but you better not be in the 1% :) That's what I liked about France: nobody expects you to be normal, so everybody is used to working around systems. For the Dutch (and Germans), systems are sacred, and if they don't work, it must be you!