During the existence of the Independent State of Croatia, from 1941 till 1945, Tomašić belonged to the middle fraction of the HSS, gathered around Vladko Maček; he was also a member of the immediate war leadership of the Party.
•
At the same time, Tomašić was studying at the Faculty of Law, University of Zagreb, but in the 1921 he graduated from teachers' school and worked in Sveti Martin na Muri as a teacher in an elementary school, but in 1923 he was fired due to his political activity.