Whether or not you can claim your 20-year-old son as a dependent on your taxes depends on several factors. In general, to claim a dependent on your taxes, the person must meet the IRS’s definition of a “qualifying child.” A qualifying child must be:
- Under the age of 19 or under the age of 24 if a full-time student for at least five months of the year.
- Supported by you financially for more than half of the year.
- A U.S. citizen, U.S. national, or U.S. resident alien.
- Not provide more than half of his own support during the year.
- Not file a joint tax return with his spouse, if married.
If your 20-year-old son meets these criteria, you may be able to claim him as a dependent on your taxes. However, if he has already filed his own tax return, you cannot claim him as a dependent. Additionally, if he has earned enough income, he may be required to file his own tax return. It’s best to consult a tax professional or check the IRS website for more information.