Szabó moved back to Hungary in 2003 and joined the Hungarian Helsinki Committee in 2004, where she coordinated the refugee program for four years. She was a founding member of the LMP party between 2009 and 2013. She led the common list of the Politics Can Be Different with the Humanist Party in the 2009 European Parliament election. She was elected to the National Assembly from the party's National List during the 2010 Hungarian parliamentary election. She served as Vice-Chairperson of the Committee on Human Rights, Minority, Civic and Religious Affairs between May 14, 2010 and February 11, 2013. After party split, she became a member of the same committee on February 25, 2013. In January 2013, the LMP's congress rejected the electoral cooperation with other opposition forces, including Together 2014, for the second time. As a result members of LMP’s “Dialogue for Hungary” platform, including Tímea Szabó, announced their decision to leave the party and form a new organization. Benedek Jávor said the eight MPs leaving LMP would keep their parliamentary mandates. The leaving MPs established Dialogue for Hungary as a full-fledged party. The Dialogue for Hungary held its inaugural congress on 17 February 2013. Szabó was elected co-president of the party, alongside Benedek Jávor. The congress also authorized the party's presidency to open the negotiations with Together 2014. On 8 March 2013, the PM party entered into an alliance with Together 2014, which officially formed as a political party. Gordon Bajnai said the two parties will run on a joint ticket and field joint candidates for prime minister and deputies in the country’s next parliamentary election in Spring 2014. Jávor and Szabó, co-chairs of PM also became members of Together 2014's board. On 14 January 2014, left-wing opposition parties agreed to submit a joint list for the spring general election. Co-leader of the Dialogue for Hungary Tímea Szabó was placed fifth on the joint national list of the MSZP, E14-PM, DK and Liberals. She was elected MP in the 2014 national election and did not join any parliamentary groups. She became a member of the Committee on Welfare. She ran as a joint individual candidate of the Dialogue for Hungary and the Hungarian Socialist Party in the 2018 Hungarian parliamentary election. She defeated Fidesz candidate Erzsébet Menczer and became MP for Óbuda-Békásmegyer. Her party was able to form a parliamentary group and she was elected leader of the party's caucus.
Personal life
Her ex-husband is Gábor Hunyadi, a former member of Jobbik and the party's delegate to the National Election Committee during the 2010 parliamentary election. Hunyadi joined the neo-Nazi movement Hungarian Dawn in 2012. Their son is Gergő.