Taneja's career finally saw a turning point in 2014, when he signed the parallel lead role of Purab Khanna in Zee TV popular daily soap Kumkum Bhagya, created by Kapoor.[5][6] He won the Best Supporting Actor award at the Zee Gold Awards. He left the show in 2016.
Taneja left Indonesia and headed back to Bombay where he landed his first lead role in a TV show. In February 2018, Taneja began essaying the main character of Vivaan Kapoor in Zee TVKaleerein.[10] It went off air in November 2018.
In July 2019, Arjit was cast as lead male actor in Colors TVlove triangle-themed Bahu Begum which premiered on July 15, 2019.[11] In the show Taneja’s character was Azaan Akhtar Mirza, the Nawab of Bhopal which co-starred Samiksha Jaiswal and Diana Khan.[12] It ended on January 21, 2020.
Arjit also made a special appearance at the ITA Awards in 2020.[13]
Arjit then landed the lead role as Shambhu Thakur on Nath – Zewar Ya Zanjeer on Dangal TV. The show premiered on August 23, 2021. But after a few months inside the show, he decided to quit the show. Arjit when interviewed said, “he did not see his role shaping up as he wanted it to be”. Arjit’s last shoot day was March 7, 2022 and his final episode aired on March 10, 2022, Episode 172.
On March 22, 2022, it was confirmed Arjit had been roped in to be a candidate as a suitor for Parineeti Chopra alongside other television actors Vishal Aditya Singh and Shivin Narang on Hunarbaaz: Desh Ki Shaan "Parineeti Ka Swayamvar" on Colors TV. Taneja was seen doing just about everything from presenting her with roses, complimenting her with his soothing words, to getting down on one knee and even cooking to impress the Hasee Toh Phasee actress. Judges Karan Johar, Mithun Chakraborty and hosts Bharti Singh and Haarsh Limbachiya were there to assist Parineeti Chopra in taking the right decision. Veteran singer Kumar Sanu also joined the panel as a special guest. When called on stage to showcase his cooking skill by making Parineeti Chopra’s favorite ‘Aloo Paratha’, Taneja was quite impressive. The actress could not resist the taste and initially she announced the winner : Best aloo paratha goes to her Punjabi munda, Arjit. Still indecisive of a suitor, Karan Johar then suggested they do a Bollywood Quiz via a Miss India format. Parineeti then chose Arjit as ‘Mr. India’ and Runner-Up Shivin Narang. After being quizzed, Taneja won with his impeccable and quick responses. Hunarbaaz: Desh Ki Shaan special episodes were aired on Saturday 26 and Sunday 27 March at 9pm and 7pm on Colors TV.
In April 2022, Taneja once more reprised his role as Farishta in Naagin 6 on Colors TV.
In September 2022, it was made public knowledge that Arjit would join StarPlus show Banni Chow Home Delivery which starred Ulka Gupta and Pravisht Mishra. His character is a ‘Rockstar’ Agastya Kapoor. Arjit was quoted as saying, "I was looking for something that could challenge me as an actor and the Banni Chow offer came at the right time. I will have a grand entry as a rockstar and it will bring along a lot of mystery and suspense”. His first episode aired on September 14, 2022. After a few months on the show, Arjit decided to move on and his last shoot day was December 1, 2022. His final episode aired on December 11, 2022.
In January 2023, Arjit and Sanaya Irani teamed up for another collab. Butterflies Season 4 EP 5 Upgrade web series was released on February 12.