Possible if he meets all of these requirements. #2 does not apply since he is your son. #3 does not apply since he is over age 23.
---Tests to be a Qualifying Relative (& Unrelated Persons)---
(Must meet ALL of these tests to be a dependent)
1. The person cannot be your qualifying child or the qualifying child of any other taxpayer.
2. The person either must be related to you, or must live with you all year (all 365 days - There are exceptions for temporary absences such as school, illness, business, vacation, military service) as a member of your household.
3. The person's gross income for the year must be less than $4,300 (tax-exempt income, such as certain social security benefits, is not included in gross income)
4. You must provide more than half of the person's total support** for the year.
5. The person is not filing a joint return.
In any case, the person must be a U.S. citizen, U.S. resident alien, U.S. national, or a resident of Canada or Mexico
The above is simplified; see IRS Publication 501 for full information.
** Worksheet for determining support
Yes. You can claim him as a qualifying relative as long as he meets the following criteria.
The person can't be your qualifying child or the qualifying child of any other taxpayer.
The person either (a) must be related to you in one of the ways listed under Relatives who don't have to live with you , or (b) must live with you all year as a member of your household (and your relationship must not violate local law).
The person's gross income for the year must be less than $4,300.
You must provide more than half of the person's total support for the year.
When answering the TurboTax interview questions about your dependents, you will be asked about each of these. TurboTax will then let you know if he qualifies as your dependent.
The support and gross income rules are the ones that routinely disqualify dependents.
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