Abstract
Using Hα and [OIII]λ5007 images taken with the 4.1 m SOAR telescope we have created a catalogue of HII regions in the HII galaxies Tol 1358-328 and Mrk 1318. This catalogue is the first step of a work that intends to characterize star formation and its impact in the surrounding interstellar medium (ISM) in extremely young HII galaxies.