Figuring out Federal ID Number without 1098-T

My school is an accredited university.  I attended part-time as a graduate student this year.  Since I was a part-time student, the school will not generate me a 1098-T.

 

Per I didn't receive a 1098-t, although I went to school last year. How do I claim what I paid? I can still enter my school bills as long as I have proof, which I do.  I have the receipts of each class's purchase, and my academic transcript.

 

However, I need to enter my filer's federal ID number.  How can I acquire this information, without a 1098-T?