> some other tax number
I imagine your voter registration. That one is a very "secretive" number, since people used to use it to commit voter fraud by the 80s and 90s.
Anyway, that's a site where you register to report and pay taxes. It's not something other people will rush to do in your name. There is usually extra security on the services that provide stuff that people actually want.
> Anyway, that's a site where you register to report and pay taxes.
No, it's a government website where you generate invoices so that other people can pay you for services rendered. Every businessman needs to deal with this bureaucracy.
> It's not something other people will rush to do in your name.
Anyone who impersonates me and gets into this system could launder money through my business.