Can you file your 34 year old as a dependent on your taxes?

Only after all of the rules or met for this purpose that you both will have to meet.

You and your adult 34 year would be the only one that would know if the 34 year old could be claimed as your qualifying relative dependent on your income tax return.

For all of the rules go to the IRS gov website and use the search box for PUBLICATION 17 go to Chapter 3. Personal Exemptions and Dependents

Qualifying Relative

There are four tests that must be met for a person to be your qualifying relative. The four tests are:

1. Not a qualifying child test,

2. Member of household or relationship test,

3. Gross income test, and

4. Support test.

Age. Unlike a qualifying child, a qualifying relative can be any age. There is no age test for a qualifying relative.

Each test is explained below and you will also find the worksheet that you can use to determine if the support test is met.

Gross Income Test

To meet this test, a person's gross income for the year must be less than $3,650.

Gross income defined.