Q Where (what line) does the info from 1098 T show on the 1040?

A.  The numbers on the 1098-T don't show on the 1040. The numbers on the 1098-T are use to calculate a tuition credit, or sometimes to calculate taxable scholarship.  The calculations are done on form 8863. 

If a credit is calculated, the non refundable portion goes on line 3 of Schedule 3, then  Line 20 of Form 1040.   The refundable portion goes on line 29 of form 1040 (the American Opportunity Credit usually comes in 2 pieces). 

If taxable scholarship is calculated, it goes on line 8r of Schedule 1, then line 8 of form 1040.