Final answer:
Determining if individuals can be claimed as dependents and if they should file a tax return depends on various criteria such as relationship to the taxpayer, residency, age, and financial support. Without specific information for each individual, it is not possible to provide a definitive answer.
Step-by-step explanation:
When determining if an individual can be claimed as a dependent for tax purposes, there are several criteria that need to be met. Some of these criteria include the relationship to the taxpayer, residency, age, and financial support. Based on the provided information, it is not possible to determine if any of the individuals can be claimed as a dependent without further details.
In terms of filing a tax return, it depends on the individual's income level. If their income exceeds certain thresholds set by the IRS, they would be required to file a tax return. These thresholds can vary depending on factors such as filing status, age, and income type. Without specific income information for each individual, it is not possible to determine if they are legally required to file a tax return.
Generally, even if an individual is not legally required to file a tax return, it may still be beneficial for them to do so. For example, if taxes were withheld from their income, they may be eligible for a refund. Additionally, filing a tax return can help establish a record of income, which may be necessary for various financial transactions or applications in the future.