Why don't you have a 1098-T? You can only deduct tuition paid to an eligible educational institution. An eligible educational institution is required to issue a 1098-T. Contact the school for a copy.
There are some circumstances where a 1098-T does not need to be issued but in those cases there is nothing for you to deduct.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**