After you file

Since you have already filed your return, wait until the IRS fully processes your return, and then file an amendment.   The amendment forms (1040-X) will be ready next month - you have 3 years to file the amendment.    The 1098-E is not a required tax form, but if it qualifies you for a tax credit, file the amendment once your original return gets processed.  

You can check this link to access the Forms Availability Tool to see if and when forms are available.