 Mumtaz got her first break in script writing with TV series, "Haqeeqat" on Sahara One in 2001, which was based on real-life incidents.This was followed by "Dharti Ka Veer Yodha Prithviraj Chauhan" (2006-2009), "Dharam Veer" (2008), "Mohe Rang De" (2009) and "Mere Ghar Aayi Ek Nanhi Pari" (2009) on Colors.She wrote for "Yeh Rishta Kya Kehlata Hai" (2009) and "Chand Chupa Badal Mein" (2010–2011) on Star Plus, and "Ek Boond Ishq" on Life OK.