Comparison between the fit linear limb darkening coefficients derived from the V1298 Tau b visit (Barat et al. 2024) and theoretical limb darkening model for a main sequence star of a similar spectral type. The theoretical models have been derived using EXOCTK (Bourque et al. 2021) for a star with similar spectral type as V1298 Tau (K1). We used photospheric temperature of 5000K, log g=4 and solar metallic- ity (Finociety et al. 2023) PHOENIX models to simulate the theoretical linear limb darkening coefficients in the HST/WFC3 G141 bandpass. To our knowledge, this is the first time that the limb darkening of a weak-lined T-Tauri star has been measured. The measured limb darkening appears significantly different compared to that of a main sequence star of the same spectral type. This discrepancy between with main- sequence models is could be due to different interior structure and high magnetic field of this young star (see Sect. 4.2). This figure highlights the importance of fitting for the limb darkening when analyzing transit light curves around such young stars.