A&A Forthcoming: Zechmeister et al. (2019) "The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star"
https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/201935460As per the majority of studies bar the one in the first post of this thread, Teegarden's Star comes out as a very-low-mass star rather than a brown dwarf: estimated mass 0.089 solar masses. It is relatively quiet for its spectral type (M7V), likely age 8–10 Gyr.
Teegarden b has minimum mass ~1.25 Earths, 4.9-day orbit (0.0252 AU).
Teegarden c has minimum mass ~1.11 Earths, 11.409-day orbit (0.0443 AU).
According to figure 13, Teegarden c is in the conservative HZ (using Kopparapu et al., 2014), Teegarden b is in the optimistic inward extension.
Planet b does not appear to be transiting, they did not search for transits of planet c.