Abstract: Protostars play an important role in cosmic evolution. It is during the protostellar phase that most of a stars mass is accreted, and feedback driven by this accretion is thought to lower the star formation efficiency and shape the IMF.  Outflows from protostars also help regulate star formation in molecular clouds. Finally, the material for planet formation is assembled into disks during the protostellar phase.  I will present current results from the IPA (Investigating Protostellar Accretion) program which is studying five protostars across the mass spectrum at 2.9-28 microns with the JWST IFUs. These data probe both the feedback from young stars and the chemistry of ices on dust grains. I will overview how JWST, combined with ALMA and time-domain IR data, can probe the complicated network of processes in protostars, from several thousand au to stellar scales. I will then present the forthcoming HEFE large program on JWST, and discuss the future potential of the observatory to study galactic star formation.