My school is only giving me my 1098-T form from 2018. Do i enter that information?

No, not on your 2019 tax return.

 In the TurboTax (TT) interview, you will be  if you have an exception to getting a 1098-T. Answer yes.  The fact that your school normally issues one, means you qualify. 

The 1098-T is only any informational document. The numbers on it are not required to be entered onto your tax return. However receipt of a 1098-T frequently means you are either eligible for a tuition credit or deduction or possibly your student has taxable scholarship income. 

If you claim the tuition credit, you do need to report that you got one or that you qualify for an exception (the TurboTax interview will handle this)

You claim the tuition credit, or report scholarship income, based on your own financial records, not the 1098-T.