Yes, you can do that. Don't claim exempt on your W-4, but add an adjustment to line 4b. To correct for the fact that line 4b is based on deductions, rather than credits, divide the credit by your tax rate. For example, if you are in the 22% bracket and you are expecting a $7000 credit, that would be equivalent to $7000÷22%=$31,800 of extra deductions. It would be better for you to underestimate the deduction so you still get a refund (but smaller) than to overestimate the deduction and have to pay tax, because that could lead to owing a penalty. And don't forget to readjust your withholding in January 2025.