Yes, you are correct Form 1040X will need to be filed with the IRS in order to add Form 1098-E.
- You will need to follow the instructions for creating an amended return (provided below), then you will add Form 1098-E.
- Once this information has been entered, you will complete the review process and print and mail Form 1040X along with any additional schedules (TurboTax will print all of this for you).
- You will mail these documents to the address listed in the instructions that print with the amended return. The IRS does not allow amended returns to be efiled.
You will want to note on the return the reason for amending is that you added Form 1098-E that was not filed with the original return. TurboTax will ask for this during the amendment process.
Please see these instructions for amending a return in TurboTax Online: https://ttlc.intuit.com/replies/5567856
Please see these instructions for adding Form 1098-E: https://ttlc.intuit.com/replies/4801974