https://meta.stackexchange.com/help/whats-meta

> If you have an account on Meta Stack Exchange, you have an account on
> its meta site.
> 
> You do not need to create a separate account for meta; once you are
> logged in on Meta Stack Exchange, you are also logged in and may post
> on its meta site.
> 
> Votes on meta do not affect your reputation; your meta reputation is
> the same as your reputation on Meta Stack Exchange (synchronized
> hourly), though you earn separate badges. You must have 5 reputation
> to participate on meta.

Meta SE doesn't have a meta site!