Yes, you can absolutely claim an education credit for that since you made the tuition payment in 2017. As for the 1098T, have you tried contacting the school directly to ask when the new 1098T will be posted online?
If you would like to enter the amounts yourself, the amount you were charged for tuition (not the amount paid) for 2017 will go in Box 2. The amount that you actually PAID will be entered in Box 1. In Box 5, enter any scholarships or grants (not student loans) your son received. Student loans, if he received any and even if they are paid by you, are considered an amount paid (Box 1). If your son was a full-time student, be sure to check Box 8 and if he was a graduate student (already had Bachelors and was pursuing Masters, Doctorate), check Box 9.
