Would refund change if amend to include 1098-E?
Yes.
The student loan deduction is not an itemized deduction.
Please read this TurboTax article on the student loan interest deduction.
Student loan interest is not an itemized deduction for Schedule A. You can use student loan interest without itemizing deductions.
Technically, it's an "adjustment to income" and goes on Schedule 1, then to form 1040.