If you are still claiming your son, then you also claim the education credit that he is eligible for. If your son filed as a dependent, he is not allowed to take any education credits. Even if he included Form 1098-T on his return, it should not have awarded him any education credits. If he has already filed, you can check his return to make sure everything was done correctly:
- Form 1040, the box You as a dependent should be selected in the Standard Deduction section
- Form 1040 Line 29 and Schedule 3 Line 3 should be empty. If there is no schedule 3, that also works.
If that is how his return appears, that means he filed as a dependent and his return does not include any education credit. You should claim him and the education credit on your own return.
If your son did not file as a dependent, you can file an amended return for him to correct the error, assuming he still was your dependent. If he was a full-time student for at least five months of the year and he did not provide more than half his own support, he was probably your dependent. You can check the full qualifications here. You will have to mail in your own return to claim him, as it will be automatically rejected if you try to claim someone who has already filed a return.
You can also let his return stand as it is if he is not your dependent, but it does mean you would not claim him on yours.
