How to get credit if student loan interest paid is less than $600?

Last year I paid $1200 in Student Loan Interest and received the credit when I filed Married but Separate. I got the 1098 E form.

This year I paid $500 in Student Loan Interest and did not get the 1098E. I've been trying to find a way to get this $500 applied as a credit, but I've had no luck. 

Any advice?

Thanks.