Short Answer 
To claim someone as a dependent, they must be financially supported and meet certain IRS criteria regarding age and living situation. For example, a 17-year-old student living at home can be claimed, while a 24-year-old professional is considered independent due to earning their own income and providing for themselves.
Step 1: Understanding Dependents
To determine who can be claimed as a dependent, it is crucial to consider the individual’s age, living situation, and financial support. Typical dependents include minors or individuals financially supported by their parents. The IRS sets guidelines that stipulate a dependent must not provide more than half of their own support and should primarily rely on others for their basic needs.
Step 2: Profiles of Dependents
A 17-year-old high school student living with their parents exemplifies a dependent. This individual meets the qualifying criteria as they receive support such as:
- Food
- Clothing
- Shelter
Since they are not married and live at home, their parents can claim them as a dependent on their tax returns.
Step 3: Identifying Non-Dependents
In contrast, a 24-year-old working professional cannot be claimed as a dependent. Factors contributing to this conclusion include:
- Income exceeding IRS thresholds for qualifying relatives
- Provision of more than half of their own support
- Living independently without parental help
This individual is considered financially independent, hence ineligible to be claimed as a dependent by their parents or guardians.