Tell your son that just got married to file married filing seperate (I am assuming he and his wife have a very small income, if that isn't the case, this may not work). Claim him and the credit (because of the changes in the tax law, there is almost no benefit for your son to claim himself) and split the difference on the tuition credit with him. Tell your son's bride to do the same with her parents.

Chances are that your son is not getting the full benefit of the tax credit because it is partially refundable and non-refundable. so he's getting the refundable portion but losing the credit for the non refundable portion.

I have done this with tax clients and it has worked out in everyone's favor.

The same can be done for your son that works and supports himself. A strong argument can be made that you still can claim him, but it depends on how old he is. But it is very likely if he is a full-time student that he is getting only half the benefit from the tuition credit and no benefit from claiming himself.

All of this assumes that your kids are not making much of an income and are full-time students.

If this all works out for you you could potentially be saving hundreds and possibly thousands of dollars in taxes that you can split with your kids and that they wouldn't get if they claim themselves.

Good luck and you're welcome.