Tax related question for MSCA IF fellows

Bonsoir, I hope everyone is doing good. I have a question regarding the annual tax deduction from the salaries of MSCA IF fellows (non-europeans) working in France. I have noticed that I paid the income tax of 4861 euros in the year 2019 (Impot sur la revenu preleve a la source 405.04 euros/mois, Taux non Personnalise 12%). I was wondering if this much amount of income tax is normal and that the other MSCA IF fellows in France also paid a similar amount! Would anybody be able to confirm it? I would greatly appreciate any feedback. Thank you. Have a good evening. Take care. Best Regards, Garima Singh