Is Zakat al-Fitr obligatory for a 21-year-old man who lives in a rented apartment, receives his deceased father's pension, a stipend from the university, and Zakat from social security?

Zakat al-Fitr becomes obligatory upon you if you possess what exceeds your needs for the day of Eid by the amount of a sa', which is approximately three kilograms of rice. Often, someone in your situation finds enough for their needs and more, therefore Zakat al-Fitr is incumbent upon you.