Tomić was given the 167th position on the Progressive Party's Aleksandar Vučić — For Our Children list in the 2020 parliamentary election and was elected when the list won a landslide majority with 188 out of 250 mandates.[9] He is a member of the assembly committee on the economy, regional development, trade, tourism, and energy; a deputy member of the culture and information committee and the committee on finance, state budget, and control of public spending; the leader of Serbia's parliamentary friendship group with Fiji; and a member of the parliamentary friendship groups with Australia, Austria, Azerbaijan, Bosnia and Herzegovina, Brazil, Bulgaria, Canada, China, Cuba, Cyprus, the Czech Republic, France, Germany, Greece, Hungary, India, Iraq, Iran, Italy, Japan, Kazakhstan, Luxembourg, Montenegro, North Macedonia, Norway, Poland, Qatar, Romania, Russia, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Tunisia, Turkey, Ukraine, the United Arab Emirates, the United Kingdom, and the United States of America.[10]
He also became a member of Serbia's delegation to the Parliamentary Assembly of the Council of Europe (PACE) in January 2021. He is a member of the committee on social affairs, health, and sustainable development and the committee on culture, science, education, and media.[11]