Comparison between the observed spectrum of SN 2020taz obtained on 29 September 2020, corresponding to 11.0 days after the estimated time of maximum light (MJD = 59121.85), and a synthetic spectrum from a CDS model based on he4p0. The model assumes a shell located at a radius of 1.5 × 10¹⁵ cm, expanding at a velocity of 500 km s⁻¹, and powered at a rate of 3 × 10⁴² erg s⁻¹. No smoothing has been applied to either the observed or synthetic spectra. The model spectra were provided by L. Dessart (priv. comm.).