  Outflows and winds launched from young stars play a crucial role in the
evolution of protostars and the early stages of planet formation. However, the
specific details of the mechanism behind these phenomena, including how they
affect the protoplanetary disk structure, are still debated. We present {\it
JWST} NIRSpec Integral Field Unit (IFU) observations of atomic and H$_2$ lines
from 1 -- 5.1 $\mu$m toward the low-mass protostar TMC1A. For the first time, a
collimated atomic jet is detected from TMC1A in the [Fe II] line at 1.644
$\mu$m along with corresponding extended H$_2$ 2.12 $\mu$m emission. Towards
the protostar, we detected spectrally broad H I and He I emissions with
velocities up to 300 km/s that can be explained by a combination of
protostellar accretion and a wide-angle wind. The 2$\mu$m continuum dust
emission, H I, He I, and O I all show emission from the illuminated outflow
cavity wall and scattered line emission. These observations demonstrate the
potential of {\it JWST} to characterize and reveal new information about the
hot inner regions of nearby protostars. In this case, a previously undetected
atomic wind and ionized jet in a well-known outflow.
